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Finding the Fourth Proportional to 138,472.44, 207,728.60 and 43,670.40

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Solution

The fourth proportional to 138,472.44, 207,728.60 and 43,670.40 is: 65,511.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,472.44 : 207,728.60 = 43,670.40 : x
  2. Step 2: Convert to fraction form
    138,472.44/207,728.60 = 43,670.40/x
  3. Step 3: Cross multiply
    138,472.44x = 207,728.60 × 43,670.40
  4. Step 4: Simplify right side
    138,472.44x = 9,071,591,053.44
  5. Step 5: Solve for x
    x = 9,071,591,053.44/138,472.44
  6. Step 6: Final answer
    x = 65,511.89

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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.