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Finding the Fourth Proportional to 57,432.72, 86,149.11 and 21,885.75

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Solution

The fourth proportional to 57,432.72, 86,149.11 and 21,885.75 is: 32,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,432.72 : 86,149.11 = 21,885.75 : x
  2. Step 2: Convert to fraction form
    57,432.72/86,149.11 = 21,885.75/x
  3. Step 3: Cross multiply
    57,432.72x = 86,149.11 × 21,885.75
  4. Step 4: Simplify right side
    57,432.72x = 1,885,437,884.18
  5. Step 5: Solve for x
    x = 1,885,437,884.18/57,432.72
  6. Step 6: Final answer
    x = 32,828.64

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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.