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Finding the Fourth Proportional to 138,609.88, 207,937.23 and 54,324.32

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Solution

The fourth proportional to 138,609.88, 207,937.23 and 54,324.32 is: 81,495.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,609.88 : 207,937.23 = 54,324.32 : x
  2. Step 2: Convert to fraction form
    138,609.88/207,937.23 = 54,324.32/x
  3. Step 3: Cross multiply
    138,609.88x = 207,937.23 × 54,324.32
  4. Step 4: Simplify right side
    138,609.88x = 11,296,048,548.68
  5. Step 5: Solve for x
    x = 11,296,048,548.68/138,609.88
  6. Step 6: Final answer
    x = 81,495.26

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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.