Home / 87,998.12-121,405.56-57,799.80

Finding the Fourth Proportional to 87,998.12, 121,405.56 and 57,799.80

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Solution

The fourth proportional to 87,998.12, 121,405.56 and 57,799.80 is: 79,742.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,998.12 : 121,405.56 = 57,799.80 : x
  2. Step 2: Convert to fraction form
    87,998.12/121,405.56 = 57,799.80/x
  3. Step 3: Cross multiply
    87,998.12x = 121,405.56 × 57,799.80
  4. Step 4: Simplify right side
    87,998.12x = 7,017,217,086.89
  5. Step 5: Solve for x
    x = 7,017,217,086.89/87,998.12
  6. Step 6: Final answer
    x = 79,742.81

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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.