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Finding the Fourth Proportional to 138,019.40, 207,029.10 and 44,525.15

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Solution

The fourth proportional to 138,019.40, 207,029.10 and 44,525.15 is: 66,787.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,019.40 : 207,029.10 = 44,525.15 : x
  2. Step 2: Convert to fraction form
    138,019.40/207,029.10 = 44,525.15/x
  3. Step 3: Cross multiply
    138,019.40x = 207,029.10 × 44,525.15
  4. Step 4: Simplify right side
    138,019.40x = 9,218,001,731.87
  5. Step 5: Solve for x
    x = 9,218,001,731.87/138,019.40
  6. Step 6: Final answer
    x = 66,787.73

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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.