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Finding the Fourth Proportional to 86,419.60, 129,550.42 and 73,177.86

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Solution

The fourth proportional to 86,419.60, 129,550.42 and 73,177.86 is: 109,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,419.60 : 129,550.42 = 73,177.86 : x
  2. Step 2: Convert to fraction form
    86,419.60/129,550.42 = 73,177.86/x
  3. Step 3: Cross multiply
    86,419.60x = 129,550.42 × 73,177.86
  4. Step 4: Simplify right side
    86,419.60x = 9,480,222,497.70
  5. Step 5: Solve for x
    x = 9,480,222,497.70/86,419.60
  6. Step 6: Final answer
    x = 109,699.91

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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.