Home / 120,121.55-165,755.05-66,397.89

Finding the Fourth Proportional to 120,121.55, 165,755.05 and 66,397.89

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Solution

The fourth proportional to 120,121.55, 165,755.05 and 66,397.89 is: 91,622.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,121.55 : 165,755.05 = 66,397.89 : x
  2. Step 2: Convert to fraction form
    120,121.55/165,755.05 = 66,397.89/x
  3. Step 3: Cross multiply
    120,121.55x = 165,755.05 × 66,397.89
  4. Step 4: Simplify right side
    120,121.55x = 11,005,785,410.85
  5. Step 5: Solve for x
    x = 11,005,785,410.85/120,121.55
  6. Step 6: Final answer
    x = 91,622.08

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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.