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Finding the Fourth Proportional to 138,293.22, 207,393.62 and 54,031.53

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Solution

The fourth proportional to 138,293.22, 207,393.62 and 54,031.53 is: 81,029.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,293.22 : 207,393.62 = 54,031.53 : x
  2. Step 2: Convert to fraction form
    138,293.22/207,393.62 = 54,031.53/x
  3. Step 3: Cross multiply
    138,293.22x = 207,393.62 × 54,031.53
  4. Step 4: Simplify right side
    138,293.22x = 11,205,794,330.68
  5. Step 5: Solve for x
    x = 11,205,794,330.68/138,293.22
  6. Step 6: Final answer
    x = 81,029.24

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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.