Home / 80,713.50-121,070.85-28,122.90

Finding the Fourth Proportional to 80,713.50, 121,070.85 and 28,122.90

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Solution

The fourth proportional to 80,713.50, 121,070.85 and 28,122.90 is: 42,184.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,713.50 : 121,070.85 = 28,122.90 : x
  2. Step 2: Convert to fraction form
    80,713.50/121,070.85 = 28,122.90/x
  3. Step 3: Cross multiply
    80,713.50x = 121,070.85 × 28,122.90
  4. Step 4: Simplify right side
    80,713.50x = 3,404,863,407.47
  5. Step 5: Solve for x
    x = 3,404,863,407.47/80,713.50
  6. Step 6: Final answer
    x = 42,184.56

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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.