Home / 120,105.06-165,737.76-66,386.87

Finding the Fourth Proportional to 120,105.06, 165,737.76 and 66,386.87

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Solution

The fourth proportional to 120,105.06, 165,737.76 and 66,386.87 is: 91,609.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,105.06 : 165,737.76 = 66,386.87 : x
  2. Step 2: Convert to fraction form
    120,105.06/165,737.76 = 66,386.87/x
  3. Step 3: Cross multiply
    120,105.06x = 165,737.76 × 66,386.87
  4. Step 4: Simplify right side
    120,105.06x = 11,002,810,298.52
  5. Step 5: Solve for x
    x = 11,002,810,298.52/120,105.06
  6. Step 6: Final answer
    x = 91,609.88

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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.