Home / 81,502.20-122,253.30-72,316.80

Finding the Fourth Proportional to 81,502.20, 122,253.30 and 72,316.80

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Solution

The fourth proportional to 81,502.20, 122,253.30 and 72,316.80 is: 108,475.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,502.20 : 122,253.30 = 72,316.80 : x
  2. Step 2: Convert to fraction form
    81,502.20/122,253.30 = 72,316.80/x
  3. Step 3: Cross multiply
    81,502.20x = 122,253.30 × 72,316.80
  4. Step 4: Simplify right side
    81,502.20x = 8,840,967,445.44
  5. Step 5: Solve for x
    x = 8,840,967,445.44/81,502.20
  6. Step 6: Final answer
    x = 108,475.20

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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.