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Finding the Fourth Proportional to 60,872.92, 91,306.20 and 21,430.30

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Solution

The fourth proportional to 60,872.92, 91,306.20 and 21,430.30 is: 32,144.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,872.92 : 91,306.20 = 21,430.30 : x
  2. Step 2: Convert to fraction form
    60,872.92/91,306.20 = 21,430.30/x
  3. Step 3: Cross multiply
    60,872.92x = 91,306.20 × 21,430.30
  4. Step 4: Simplify right side
    60,872.92x = 1,956,719,257.86
  5. Step 5: Solve for x
    x = 1,956,719,257.86/60,872.92
  6. Step 6: Final answer
    x = 32,144.33

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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.