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Finding the Fourth Proportional to 72,565.92, 100,143.60 and 42,370.56

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Solution

The fourth proportional to 72,565.92, 100,143.60 and 42,370.56 is: 58,472.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.92 : 100,143.60 = 42,370.56 : x
  2. Step 2: Convert to fraction form
    72,565.92/100,143.60 = 42,370.56/x
  3. Step 3: Cross multiply
    72,565.92x = 100,143.60 × 42,370.56
  4. Step 4: Simplify right side
    72,565.92x = 4,243,140,412.42
  5. Step 5: Solve for x
    x = 4,243,140,412.42/72,565.92
  6. Step 6: Final answer
    x = 58,472.91

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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.