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Finding the Fourth Proportional to 125,312.62, 172,915.43 and 71,601.12

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Solution

The fourth proportional to 125,312.62, 172,915.43 and 71,601.12 is: 98,800.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,312.62 : 172,915.43 = 71,601.12 : x
  2. Step 2: Convert to fraction form
    125,312.62/172,915.43 = 71,601.12/x
  3. Step 3: Cross multiply
    125,312.62x = 172,915.43 × 71,601.12
  4. Step 4: Simplify right side
    125,312.62x = 12,380,938,453.28
  5. Step 5: Solve for x
    x = 12,380,938,453.28/125,312.62
  6. Step 6: Final answer
    x = 98,800.41

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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.