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Finding the Fourth Proportional to 72,737.28, 109,105.11 and 19,429.20

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Solution

The fourth proportional to 72,737.28, 109,105.11 and 19,429.20 is: 29,143.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,737.28 : 109,105.11 = 19,429.20 : x
  2. Step 2: Convert to fraction form
    72,737.28/109,105.11 = 19,429.20/x
  3. Step 3: Cross multiply
    72,737.28x = 109,105.11 × 19,429.20
  4. Step 4: Simplify right side
    72,737.28x = 2,119,825,003.21
  5. Step 5: Solve for x
    x = 2,119,825,003.21/72,737.28
  6. Step 6: Final answer
    x = 29,143.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.