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Finding the Fourth Proportional to 72,472.48, 100,017.15 and 40,217.43

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Solution

The fourth proportional to 72,472.48, 100,017.15 and 40,217.43 is: 55,502.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,472.48 : 100,017.15 = 40,217.43 : x
  2. Step 2: Convert to fraction form
    72,472.48/100,017.15 = 40,217.43/x
  3. Step 3: Cross multiply
    72,472.48x = 100,017.15 × 40,217.43
  4. Step 4: Simplify right side
    72,472.48x = 4,022,432,728.92
  5. Step 5: Solve for x
    x = 4,022,432,728.92/72,472.48
  6. Step 6: Final answer
    x = 55,502.90

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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.