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Finding the Fourth Proportional to 82,362.30, 123,543.45 and 72,520.80

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Solution

The fourth proportional to 82,362.30, 123,543.45 and 72,520.80 is: 108,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,362.30 : 123,543.45 = 72,520.80 : x
  2. Step 2: Convert to fraction form
    82,362.30/123,543.45 = 72,520.80/x
  3. Step 3: Cross multiply
    82,362.30x = 123,543.45 × 72,520.80
  4. Step 4: Simplify right side
    82,362.30x = 8,959,469,828.76
  5. Step 5: Solve for x
    x = 8,959,469,828.76/82,362.30
  6. Step 6: Final answer
    x = 108,781.20

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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.