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Finding the Fourth Proportional to 86,430.61, 129,766.90 and 44,340.38

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Solution

The fourth proportional to 86,430.61, 129,766.90 and 44,340.38 is: 66,572.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,430.61 : 129,766.90 = 44,340.38 : x
  2. Step 2: Convert to fraction form
    86,430.61/129,766.90 = 44,340.38/x
  3. Step 3: Cross multiply
    86,430.61x = 129,766.90 × 44,340.38
  4. Step 4: Simplify right side
    86,430.61x = 5,753,913,008.59
  5. Step 5: Solve for x
    x = 5,753,913,008.59/86,430.61
  6. Step 6: Final answer
    x = 66,572.63

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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.