Home / 120,132.72-165,781.98-66,419.04

Finding the Fourth Proportional to 120,132.72, 165,781.98 and 66,419.04

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Solution

The fourth proportional to 120,132.72, 165,781.98 and 66,419.04 is: 91,657.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,132.72 : 165,781.98 = 66,419.04 : x
  2. Step 2: Convert to fraction form
    120,132.72/165,781.98 = 66,419.04/x
  3. Step 3: Cross multiply
    120,132.72x = 165,781.98 × 66,419.04
  4. Step 4: Simplify right side
    120,132.72x = 11,011,079,960.90
  5. Step 5: Solve for x
    x = 11,011,079,960.90/120,132.72
  6. Step 6: Final answer
    x = 91,657.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.