Home / 138,972.36-208,737.46-82,921.82

Finding the Fourth Proportional to 138,972.36, 208,737.46 and 82,921.82

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Solution

The fourth proportional to 138,972.36, 208,737.46 and 82,921.82 is: 124,549.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,972.36 : 208,737.46 = 82,921.82 : x
  2. Step 2: Convert to fraction form
    138,972.36/208,737.46 = 82,921.82/x
  3. Step 3: Cross multiply
    138,972.36x = 208,737.46 × 82,921.82
  4. Step 4: Simplify right side
    138,972.36x = 17,308,890,085.38
  5. Step 5: Solve for x
    x = 17,308,890,085.38/138,972.36
  6. Step 6: Final answer
    x = 124,549.16

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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.