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Finding the Fourth Proportional to 125,312.37, 172,915.09 and 71,600.87

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Solution

The fourth proportional to 125,312.37, 172,915.09 and 71,600.87 is: 98,800.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,312.37 : 172,915.09 = 71,600.87 : x
  2. Step 2: Convert to fraction form
    125,312.37/172,915.09 = 71,600.87/x
  3. Step 3: Cross multiply
    125,312.37x = 172,915.09 × 71,600.87
  4. Step 4: Simplify right side
    125,312.37x = 12,380,869,836.55
  5. Step 5: Solve for x
    x = 12,380,869,836.55/125,312.37
  6. Step 6: Final answer
    x = 98,800.06

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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.