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Finding the Fourth Proportional to 138,636.53, 207,954.74 and 54,436.31

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Solution

The fourth proportional to 138,636.53, 207,954.74 and 54,436.31 is: 81,654.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,636.53 : 207,954.74 = 54,436.31 : x
  2. Step 2: Convert to fraction form
    138,636.53/207,954.74 = 54,436.31/x
  3. Step 3: Cross multiply
    138,636.53x = 207,954.74 × 54,436.31
  4. Step 4: Simplify right side
    138,636.53x = 11,320,287,380.65
  5. Step 5: Solve for x
    x = 11,320,287,380.65/138,636.53
  6. Step 6: Final answer
    x = 81,654.44

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1.5x scale

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.