Home / 165,287.10-247,965.45-86,380.14

Finding the Fourth Proportional to 165,287.10, 247,965.45 and 86,380.14

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Solution

The fourth proportional to 165,287.10, 247,965.45 and 86,380.14 is: 129,588.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,287.10 : 247,965.45 = 86,380.14 : x
  2. Step 2: Convert to fraction form
    165,287.10/247,965.45 = 86,380.14/x
  3. Step 3: Cross multiply
    165,287.10x = 247,965.45 × 86,380.14
  4. Step 4: Simplify right side
    165,287.10x = 21,419,290,286.16
  5. Step 5: Solve for x
    x = 21,419,290,286.16/165,287.10
  6. Step 6: Final answer
    x = 129,588.40

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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.