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Finding the Fourth Proportional to 138,231.74, 207,375.29 and 43,485.76

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Solution

The fourth proportional to 138,231.74, 207,375.29 and 43,485.76 is: 65,237.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,231.74 : 207,375.29 = 43,485.76 : x
  2. Step 2: Convert to fraction form
    138,231.74/207,375.29 = 43,485.76/x
  3. Step 3: Cross multiply
    138,231.74x = 207,375.29 × 43,485.76
  4. Step 4: Simplify right side
    138,231.74x = 9,017,872,295.73
  5. Step 5: Solve for x
    x = 9,017,872,295.73/138,231.74
  6. Step 6: Final answer
    x = 65,237.35

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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.