Home / 87,799.12-121,162.79-47,512.88

Finding the Fourth Proportional to 87,799.12, 121,162.79 and 47,512.88

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Solution

The fourth proportional to 87,799.12, 121,162.79 and 47,512.88 is: 65,567.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,799.12 : 121,162.79 = 47,512.88 : x
  2. Step 2: Convert to fraction form
    87,799.12/121,162.79 = 47,512.88/x
  3. Step 3: Cross multiply
    87,799.12x = 121,162.79 × 47,512.88
  4. Step 4: Simplify right side
    87,799.12x = 5,756,793,434.34
  5. Step 5: Solve for x
    x = 5,756,793,434.34/87,799.12
  6. Step 6: Final answer
    x = 65,567.78

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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.