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Finding the Fourth Proportional to 86,523.60, 129,688.20 and 44,387.40

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Solution

The fourth proportional to 86,523.60, 129,688.20 and 44,387.40 is: 66,531.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,523.60 : 129,688.20 = 44,387.40 : x
  2. Step 2: Convert to fraction form
    86,523.60/129,688.20 = 44,387.40/x
  3. Step 3: Cross multiply
    86,523.60x = 129,688.20 × 44,387.40
  4. Step 4: Simplify right side
    86,523.60x = 5,756,522,008.68
  5. Step 5: Solve for x
    x = 5,756,522,008.68/86,523.60
  6. Step 6: Final answer
    x = 66,531.24

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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.