Home / 120,139.20-165,793.13-66,426.48

Finding the Fourth Proportional to 120,139.20, 165,793.13 and 66,426.48

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Solution

The fourth proportional to 120,139.20, 165,793.13 and 66,426.48 is: 91,669.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,139.20 : 165,793.13 = 66,426.48 : x
  2. Step 2: Convert to fraction form
    120,139.20/165,793.13 = 66,426.48/x
  3. Step 3: Cross multiply
    120,139.20x = 165,793.13 × 66,426.48
  4. Step 4: Simplify right side
    120,139.20x = 11,013,053,951.05
  5. Step 5: Solve for x
    x = 11,013,053,951.05/120,139.20
  6. Step 6: Final answer
    x = 91,669.11

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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.