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Finding the Fourth Proportional to 138,612.39, 207,940.98 and 54,326.82

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Solution

The fourth proportional to 138,612.39, 207,940.98 and 54,326.82 is: 81,499.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,612.39 : 207,940.98 = 54,326.82 : x
  2. Step 2: Convert to fraction form
    138,612.39/207,940.98 = 54,326.82/x
  3. Step 3: Cross multiply
    138,612.39x = 207,940.98 × 54,326.82
  4. Step 4: Simplify right side
    138,612.39x = 11,296,772,191.08
  5. Step 5: Solve for x
    x = 11,296,772,191.08/138,612.39
  6. Step 6: Final answer
    x = 81,499.01

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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.