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Finding the Fourth Proportional to 135,304.89, 186,717.96 and 74,871.94

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Solution

The fourth proportional to 135,304.89, 186,717.96 and 74,871.94 is: 103,321.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,304.89 : 186,717.96 = 74,871.94 : x
  2. Step 2: Convert to fraction form
    135,304.89/186,717.96 = 74,871.94/x
  3. Step 3: Cross multiply
    135,304.89x = 186,717.96 × 74,871.94
  4. Step 4: Simplify right side
    135,304.89x = 13,979,935,898.04
  5. Step 5: Solve for x
    x = 13,979,935,898.04/135,304.89
  6. Step 6: Final answer
    x = 103,321.73

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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.