Home / 80,998.24-121,452-28,387.12

Finding the Fourth Proportional to 80,998.24, 121,452 and 28,387.12

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Solution

The fourth proportional to 80,998.24, 121,452 and 28,387.12 is: 42,564.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.24 : 121,452 = 28,387.12 : x
  2. Step 2: Convert to fraction form
    80,998.24/121,452 = 28,387.12/x
  3. Step 3: Cross multiply
    80,998.24x = 121,452 × 28,387.12
  4. Step 4: Simplify right side
    80,998.24x = 3,447,672,498.24
  5. Step 5: Solve for x
    x = 3,447,672,498.24/80,998.24
  6. Step 6: Final answer
    x = 42,564.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.