Home / 81,502.20-122,253.30-66,727.80

Finding the Fourth Proportional to 81,502.20, 122,253.30 and 66,727.80

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Solution

The fourth proportional to 81,502.20, 122,253.30 and 66,727.80 is: 100,091.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,502.20 : 122,253.30 = 66,727.80 : x
  2. Step 2: Convert to fraction form
    81,502.20/122,253.30 = 66,727.80/x
  3. Step 3: Cross multiply
    81,502.20x = 122,253.30 × 66,727.80
  4. Step 4: Simplify right side
    81,502.20x = 8,157,693,751.74
  5. Step 5: Solve for x
    x = 8,157,693,751.74/81,502.20
  6. Step 6: Final answer
    x = 100,091.70

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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.