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Finding the Fourth Proportional to 138,725.28, 208,295.28 and 82,660.32

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Solution

The fourth proportional to 138,725.28, 208,295.28 and 82,660.32 is: 124,114.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,725.28 : 208,295.28 = 82,660.32 : x
  2. Step 2: Convert to fraction form
    138,725.28/208,295.28 = 82,660.32/x
  3. Step 3: Cross multiply
    138,725.28x = 208,295.28 × 82,660.32
  4. Step 4: Simplify right side
    138,725.28x = 17,217,754,499.29
  5. Step 5: Solve for x
    x = 17,217,754,499.29/138,725.28
  6. Step 6: Final answer
    x = 124,114.04

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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.