Home / 81,079.50-121,625.74-28,500.78

Finding the Fourth Proportional to 81,079.50, 121,625.74 and 28,500.78

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Solution

The fourth proportional to 81,079.50, 121,625.74 and 28,500.78 is: 42,753.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,079.50 : 121,625.74 = 28,500.78 : x
  2. Step 2: Convert to fraction form
    81,079.50/121,625.74 = 28,500.78/x
  3. Step 3: Cross multiply
    81,079.50x = 121,625.74 × 28,500.78
  4. Step 4: Simplify right side
    81,079.50x = 3,466,428,458.08
  5. Step 5: Solve for x
    x = 3,466,428,458.08/81,079.50
  6. Step 6: Final answer
    x = 42,753.45

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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.