Home / 85,698,002.30-128,547,003.45-81,446,474.30

Finding the Fourth Proportional to 85,698,002.30, 128,547,003.45 and 81,446,474.30

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Solution

The fourth proportional to 85,698,002.30, 128,547,003.45 and 81,446,474.30 is: 122,169,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,698,002.30 : 128,547,003.45 = 81,446,474.30 : x
  2. Step 2: Convert to fraction form
    85,698,002.30/128,547,003.45 = 81,446,474.30/x
  3. Step 3: Cross multiply
    85,698,002.30x = 128,547,003.45 × 81,446,474.30
  4. Step 4: Simplify right side
    85,698,002.30x = 10,469,700,212,832,436
  5. Step 5: Solve for x
    x = 10,469,700,212,832,436/85,698,002.30
  6. Step 6: Final answer
    x = 122,169,711.45

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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.