Home / 120,122.55-165,769.07-72,385.13

Finding the Fourth Proportional to 120,122.55, 165,769.07 and 72,385.13

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Solution

The fourth proportional to 120,122.55, 165,769.07 and 72,385.13 is: 99,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,122.55 : 165,769.07 = 72,385.13 : x
  2. Step 2: Convert to fraction form
    120,122.55/165,769.07 = 72,385.13/x
  3. Step 3: Cross multiply
    120,122.55x = 165,769.07 × 72,385.13
  4. Step 4: Simplify right side
    120,122.55x = 11,999,215,734.43
  5. Step 5: Solve for x
    x = 11,999,215,734.43/120,122.55
  6. Step 6: Final answer
    x = 99,891.45

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1.5x scale

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.