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Finding the Fourth Proportional to 113,706.38, 156,915.42 and 62,720.90

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Solution

The fourth proportional to 113,706.38, 156,915.42 and 62,720.90 is: 86,555.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,706.38 : 156,915.42 = 62,720.90 : x
  2. Step 2: Convert to fraction form
    113,706.38/156,915.42 = 62,720.90/x
  3. Step 3: Cross multiply
    113,706.38x = 156,915.42 × 62,720.90
  4. Step 4: Simplify right side
    113,706.38x = 9,841,876,366.28
  5. Step 5: Solve for x
    x = 9,841,876,366.28/113,706.38
  6. Step 6: Final answer
    x = 86,555.18

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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.