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Finding the Fourth Proportional to 125,082.60, 172,611.91 and 67,721.46

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Solution

The fourth proportional to 125,082.60, 172,611.91 and 67,721.46 is: 93,454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,082.60 : 172,611.91 = 67,721.46 : x
  2. Step 2: Convert to fraction form
    125,082.60/172,611.91 = 67,721.46/x
  3. Step 3: Cross multiply
    125,082.60x = 172,611.91 × 67,721.46
  4. Step 4: Simplify right side
    125,082.60x = 11,689,530,129.13
  5. Step 5: Solve for x
    x = 11,689,530,129.13/125,082.60
  6. Step 6: Final answer
    x = 93,454.49

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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.