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Finding the Fourth Proportional to 138,286.84, 207,255.30 and 88,347.64

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Solution

The fourth proportional to 138,286.84, 207,255.30 and 88,347.64 is: 132,409.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,286.84 : 207,255.30 = 88,347.64 : x
  2. Step 2: Convert to fraction form
    138,286.84/207,255.30 = 88,347.64/x
  3. Step 3: Cross multiply
    138,286.84x = 207,255.30 × 88,347.64
  4. Step 4: Simplify right side
    138,286.84x = 18,310,516,632.49
  5. Step 5: Solve for x
    x = 18,310,516,632.49/138,286.84
  6. Step 6: Final answer
    x = 132,409.68

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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.