Home / 138,380.34-207,636.12-82,331.18

Finding the Fourth Proportional to 138,380.34, 207,636.12 and 82,331.18

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Solution

The fourth proportional to 138,380.34, 207,636.12 and 82,331.18 is: 123,535.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,380.34 : 207,636.12 = 82,331.18 : x
  2. Step 2: Convert to fraction form
    138,380.34/207,636.12 = 82,331.18/x
  3. Step 3: Cross multiply
    138,380.34x = 207,636.12 × 82,331.18
  4. Step 4: Simplify right side
    138,380.34x = 17,094,925,732.04
  5. Step 5: Solve for x
    x = 17,094,925,732.04/138,380.34
  6. Step 6: Final answer
    x = 123,535.80

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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.