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Finding the Fourth Proportional to 72,737.20, 100,371.72 and 40,899.76

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Solution

The fourth proportional to 72,737.20, 100,371.72 and 40,899.76 is: 56,438.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,737.20 : 100,371.72 = 40,899.76 : x
  2. Step 2: Convert to fraction form
    72,737.20/100,371.72 = 40,899.76/x
  3. Step 3: Cross multiply
    72,737.20x = 100,371.72 × 40,899.76
  4. Step 4: Simplify right side
    72,737.20x = 4,105,179,258.79
  5. Step 5: Solve for x
    x = 4,105,179,258.79/72,737.20
  6. Step 6: Final answer
    x = 56,438.51

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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.