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Finding the Fourth Proportional to 138,336.84, 207,304.38 and 75,103.38

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Solution

The fourth proportional to 138,336.84, 207,304.38 and 75,103.38 is: 112,546.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,336.84 : 207,304.38 = 75,103.38 : x
  2. Step 2: Convert to fraction form
    138,336.84/207,304.38 = 75,103.38/x
  3. Step 3: Cross multiply
    138,336.84x = 207,304.38 × 75,103.38
  4. Step 4: Simplify right side
    138,336.84x = 15,569,259,626.80
  5. Step 5: Solve for x
    x = 15,569,259,626.80/138,336.84
  6. Step 6: Final answer
    x = 112,546.01

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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.