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Finding the Fourth Proportional to 72,432.88, 108,670.28 and 30,291.22

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Solution

The fourth proportional to 72,432.88, 108,670.28 and 30,291.22 is: 45,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,432.88 : 108,670.28 = 30,291.22 : x
  2. Step 2: Convert to fraction form
    72,432.88/108,670.28 = 30,291.22/x
  3. Step 3: Cross multiply
    72,432.88x = 108,670.28 × 30,291.22
  4. Step 4: Simplify right side
    72,432.88x = 3,291,755,358.94
  5. Step 5: Solve for x
    x = 3,291,755,358.94/72,432.88
  6. Step 6: Final answer
    x = 45,445.60

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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.