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Finding the Fourth Proportional to 92,468.48, 138,748.80 and 39,891.20

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Solution

The fourth proportional to 92,468.48, 138,748.80 and 39,891.20 is: 59,856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,468.48 : 138,748.80 = 39,891.20 : x
  2. Step 2: Convert to fraction form
    92,468.48/138,748.80 = 39,891.20/x
  3. Step 3: Cross multiply
    92,468.48x = 138,748.80 × 39,891.20
  4. Step 4: Simplify right side
    92,468.48x = 5,534,856,130.56
  5. Step 5: Solve for x
    x = 5,534,856,130.56/92,468.48
  6. Step 6: Final answer
    x = 59,856.68

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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.