Home / 81,000.30-121,500.45-71,158.80

Finding the Fourth Proportional to 81,000.30, 121,500.45 and 71,158.80

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Solution

The fourth proportional to 81,000.30, 121,500.45 and 71,158.80 is: 106,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.30 : 121,500.45 = 71,158.80 : x
  2. Step 2: Convert to fraction form
    81,000.30/121,500.45 = 71,158.80/x
  3. Step 3: Cross multiply
    81,000.30x = 121,500.45 × 71,158.80
  4. Step 4: Simplify right side
    81,000.30x = 8,645,826,221.46
  5. Step 5: Solve for x
    x = 8,645,826,221.46/81,000.30
  6. Step 6: Final answer
    x = 106,738.20

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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.