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Finding the Fourth Proportional to 138,234.50, 207,379.42 and 43,488.53

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Solution

The fourth proportional to 138,234.50, 207,379.42 and 43,488.53 is: 65,241.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,234.50 : 207,379.42 = 43,488.53 : x
  2. Step 2: Convert to fraction form
    138,234.50/207,379.42 = 43,488.53/x
  3. Step 3: Cross multiply
    138,234.50x = 207,379.42 × 43,488.53
  4. Step 4: Simplify right side
    138,234.50x = 9,018,624,982.43
  5. Step 5: Solve for x
    x = 9,018,624,982.43/138,234.50
  6. Step 6: Final answer
    x = 65,241.49

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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.