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Finding the Fourth Proportional to 125,082.62, 172,611.92 and 67,721.47

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Solution

The fourth proportional to 125,082.62, 172,611.92 and 67,721.47 is: 93,454.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,082.62 : 172,611.92 = 67,721.47 : x
  2. Step 2: Convert to fraction form
    125,082.62/172,611.92 = 67,721.47/x
  3. Step 3: Cross multiply
    125,082.62x = 172,611.92 × 67,721.47
  4. Step 4: Simplify right side
    125,082.62x = 11,689,533,289.71
  5. Step 5: Solve for x
    x = 11,689,533,289.71/125,082.62
  6. Step 6: Final answer
    x = 93,454.50

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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.