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Finding the Fourth Proportional to 138,193.63, 207,159.22 and 54,007.80

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Solution

The fourth proportional to 138,193.63, 207,159.22 and 54,007.80 is: 80,960.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,193.63 : 207,159.22 = 54,007.80 : x
  2. Step 2: Convert to fraction form
    138,193.63/207,159.22 = 54,007.80/x
  3. Step 3: Cross multiply
    138,193.63x = 207,159.22 × 54,007.80
  4. Step 4: Simplify right side
    138,193.63x = 11,188,213,012.58
  5. Step 5: Solve for x
    x = 11,188,213,012.58/138,193.63
  6. Step 6: Final answer
    x = 80,960.41

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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.