Home / 120,136.29-165,781.38-66,418.17

Finding the Fourth Proportional to 120,136.29, 165,781.38 and 66,418.17

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Solution

The fourth proportional to 120,136.29, 165,781.38 and 66,418.17 is: 91,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,136.29 : 165,781.38 = 66,418.17 : x
  2. Step 2: Convert to fraction form
    120,136.29/165,781.38 = 66,418.17/x
  3. Step 3: Cross multiply
    120,136.29x = 165,781.38 × 66,418.17
  4. Step 4: Simplify right side
    120,136.29x = 11,010,895,879.67
  5. Step 5: Solve for x
    x = 11,010,895,879.67/120,136.29
  6. Step 6: Final answer
    x = 91,653.37

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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.