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Finding the Fourth Proportional to 138,003.40, 207,005.10 and 43,234.38

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Solution

The fourth proportional to 138,003.40, 207,005.10 and 43,234.38 is: 64,851.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,003.40 : 207,005.10 = 43,234.38 : x
  2. Step 2: Convert to fraction form
    138,003.40/207,005.10 = 43,234.38/x
  3. Step 3: Cross multiply
    138,003.40x = 207,005.10 × 43,234.38
  4. Step 4: Simplify right side
    138,003.40x = 8,949,736,120.31
  5. Step 5: Solve for x
    x = 8,949,736,120.31/138,003.40
  6. Step 6: Final answer
    x = 64,851.56

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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.