Home / 85,840,123.70-128,760,185.55-82,492,045.40

Finding the Fourth Proportional to 85,840,123.70, 128,760,185.55 and 82,492,045.40

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Solution

The fourth proportional to 85,840,123.70, 128,760,185.55 and 82,492,045.40 is: 123,738,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,840,123.70 : 128,760,185.55 = 82,492,045.40 : x
  2. Step 2: Convert to fraction form
    85,840,123.70/128,760,185.55 = 82,492,045.40/x
  3. Step 3: Cross multiply
    85,840,123.70x = 128,760,185.55 × 82,492,045.40
  4. Step 4: Simplify right side
    85,840,123.70x = 10,621,691,072,103,024
  5. Step 5: Solve for x
    x = 10,621,691,072,103,024/85,840,123.70
  6. Step 6: Final answer
    x = 123,738,068.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.