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Finding the Fourth Proportional to 123,722.29, 170,727.37 and 72,737.11

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Solution

The fourth proportional to 123,722.29, 170,727.37 and 72,737.11 is: 100,371.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,722.29 : 170,727.37 = 72,737.11 : x
  2. Step 2: Convert to fraction form
    123,722.29/170,727.37 = 72,737.11/x
  3. Step 3: Cross multiply
    123,722.29x = 170,727.37 × 72,737.11
  4. Step 4: Simplify right side
    123,722.29x = 12,418,215,491.70
  5. Step 5: Solve for x
    x = 12,418,215,491.70/123,722.29
  6. Step 6: Final answer
    x = 100,371.69

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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.