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Finding the Fourth Proportional to 138,252.25, 207,378.38 and 79,046.40

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Solution

The fourth proportional to 138,252.25, 207,378.38 and 79,046.40 is: 118,569.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,252.25 : 207,378.38 = 79,046.40 : x
  2. Step 2: Convert to fraction form
    138,252.25/207,378.38 = 79,046.40/x
  3. Step 3: Cross multiply
    138,252.25x = 207,378.38 × 79,046.40
  4. Step 4: Simplify right side
    138,252.25x = 16,392,514,615.86
  5. Step 5: Solve for x
    x = 16,392,514,615.86/138,252.25
  6. Step 6: Final answer
    x = 118,569.60

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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.