Home / 87,987.29-121,326.14-65,368.25

Finding the Fourth Proportional to 87,987.29, 121,326.14 and 65,368.25

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Solution

The fourth proportional to 87,987.29, 121,326.14 and 65,368.25 is: 90,136.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.29 : 121,326.14 = 65,368.25 : x
  2. Step 2: Convert to fraction form
    87,987.29/121,326.14 = 65,368.25/x
  3. Step 3: Cross multiply
    87,987.29x = 121,326.14 × 65,368.25
  4. Step 4: Simplify right side
    87,987.29x = 7,930,876,517.58
  5. Step 5: Solve for x
    x = 7,930,876,517.58/87,987.29
  6. Step 6: Final answer
    x = 90,136.62

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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.