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Finding the Fourth Proportional to 138,165.40, 207,248.10 and 135,093.40

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Solution

The fourth proportional to 138,165.40, 207,248.10 and 135,093.40 is: 202,640.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,165.40 : 207,248.10 = 135,093.40 : x
  2. Step 2: Convert to fraction form
    138,165.40/207,248.10 = 135,093.40/x
  3. Step 3: Cross multiply
    138,165.40x = 207,248.10 × 135,093.40
  4. Step 4: Simplify right side
    138,165.40x = 27,997,850,472.54
  5. Step 5: Solve for x
    x = 27,997,850,472.54/138,165.40
  6. Step 6: Final answer
    x = 202,640.10

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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.