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Finding the Fourth Proportional to 138,553.93, 191,204.31 and 74,891.73

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Solution

The fourth proportional to 138,553.93, 191,204.31 and 74,891.73 is: 103,350.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,553.93 : 191,204.31 = 74,891.73 : x
  2. Step 2: Convert to fraction form
    138,553.93/191,204.31 = 74,891.73/x
  3. Step 3: Cross multiply
    138,553.93x = 191,204.31 × 74,891.73
  4. Step 4: Simplify right side
    138,553.93x = 14,319,621,559.36
  5. Step 5: Solve for x
    x = 14,319,621,559.36/138,553.93
  6. Step 6: Final answer
    x = 103,350.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.