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Finding the Fourth Proportional to 86,342.48, 129,523 and 27,179.92

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Solution

The fourth proportional to 86,342.48, 129,523 and 27,179.92 is: 40,772.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,342.48 : 129,523 = 27,179.92 : x
  2. Step 2: Convert to fraction form
    86,342.48/129,523 = 27,179.92/x
  3. Step 3: Cross multiply
    86,342.48x = 129,523 × 27,179.92
  4. Step 4: Simplify right side
    86,342.48x = 3,520,424,778.16
  5. Step 5: Solve for x
    x = 3,520,424,778.16/86,342.48
  6. Step 6: Final answer
    x = 40,772.80

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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.