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Finding the Fourth Proportional to 86,372.60, 129,238.14 and 75,793.16

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Solution

The fourth proportional to 86,372.60, 129,238.14 and 75,793.16 is: 113,408.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,372.60 : 129,238.14 = 75,793.16 : x
  2. Step 2: Convert to fraction form
    86,372.60/129,238.14 = 75,793.16/x
  3. Step 3: Cross multiply
    86,372.60x = 129,238.14 × 75,793.16
  4. Step 4: Simplify right side
    86,372.60x = 9,795,367,023.12
  5. Step 5: Solve for x
    x = 9,795,367,023.12/86,372.60
  6. Step 6: Final answer
    x = 113,408.27

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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.