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Finding the Fourth Proportional to 157,419.60, 236,129.40 and 86,560.80

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Solution

The fourth proportional to 157,419.60, 236,129.40 and 86,560.80 is: 129,841.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,419.60 : 236,129.40 = 86,560.80 : x
  2. Step 2: Convert to fraction form
    157,419.60/236,129.40 = 86,560.80/x
  3. Step 3: Cross multiply
    157,419.60x = 236,129.40 × 86,560.80
  4. Step 4: Simplify right side
    157,419.60x = 20,439,549,767.52
  5. Step 5: Solve for x
    x = 20,439,549,767.52/157,419.60
  6. Step 6: Final answer
    x = 129,841.20

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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.