Home / 66,000.75-91,043.78-39,116.85

Finding the Fourth Proportional to 66,000.75, 91,043.78 and 39,116.85

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Solution

The fourth proportional to 66,000.75, 91,043.78 and 39,116.85 is: 53,959.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,000.75 : 91,043.78 = 39,116.85 : x
  2. Step 2: Convert to fraction form
    66,000.75/91,043.78 = 39,116.85/x
  3. Step 3: Cross multiply
    66,000.75x = 91,043.78 × 39,116.85
  4. Step 4: Simplify right side
    66,000.75x = 3,561,345,690.11
  5. Step 5: Solve for x
    x = 3,561,345,690.11/66,000.75
  6. Step 6: Final answer
    x = 53,959.17

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.