Home / 120,136.12-165,780.48-66,417.92

Finding the Fourth Proportional to 120,136.12, 165,780.48 and 66,417.92

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Solution

The fourth proportional to 120,136.12, 165,780.48 and 66,417.92 is: 91,652.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,136.12 : 165,780.48 = 66,417.92 : x
  2. Step 2: Convert to fraction form
    120,136.12/165,780.48 = 66,417.92/x
  3. Step 3: Cross multiply
    120,136.12x = 165,780.48 × 66,417.92
  4. Step 4: Simplify right side
    120,136.12x = 11,010,794,658.20
  5. Step 5: Solve for x
    x = 11,010,794,658.20/120,136.12
  6. Step 6: Final answer
    x = 91,652.66

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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.