Home / 87,987.74-121,391.24-57,789.42

Finding the Fourth Proportional to 87,987.74, 121,391.24 and 57,789.42

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Solution

The fourth proportional to 87,987.74, 121,391.24 and 57,789.42 is: 79,728.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,987.74 : 121,391.24 = 57,789.42 : x
  2. Step 2: Convert to fraction form
    87,987.74/121,391.24 = 57,789.42/x
  3. Step 3: Cross multiply
    87,987.74x = 121,391.24 × 57,789.42
  4. Step 4: Simplify right side
    87,987.74x = 7,015,129,352.68
  5. Step 5: Solve for x
    x = 7,015,129,352.68/87,987.74
  6. Step 6: Final answer
    x = 79,728.49

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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.