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Finding the Fourth Proportional to 138,019.91, 207,073.59 and 49,271.45

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Solution

The fourth proportional to 138,019.91, 207,073.59 and 49,271.45 is: 73,922.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,019.91 : 207,073.59 = 49,271.45 : x
  2. Step 2: Convert to fraction form
    138,019.91/207,073.59 = 49,271.45/x
  3. Step 3: Cross multiply
    138,019.91x = 207,073.59 × 49,271.45
  4. Step 4: Simplify right side
    138,019.91x = 10,202,815,000.64
  5. Step 5: Solve for x
    x = 10,202,815,000.64/138,019.91
  6. Step 6: Final answer
    x = 73,922.78

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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.