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Finding the Fourth Proportional to 82,362.80, 123,544.20 and 72,521.30

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Solution

The fourth proportional to 82,362.80, 123,544.20 and 72,521.30 is: 108,781.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,362.80 : 123,544.20 = 72,521.30 : x
  2. Step 2: Convert to fraction form
    82,362.80/123,544.20 = 72,521.30/x
  3. Step 3: Cross multiply
    82,362.80x = 123,544.20 × 72,521.30
  4. Step 4: Simplify right side
    82,362.80x = 8,959,585,991.46
  5. Step 5: Solve for x
    x = 8,959,585,991.46/82,362.80
  6. Step 6: Final answer
    x = 108,781.95

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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.