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Finding the Fourth Proportional to 71,659.49, 107,488.89 and 18,351.36

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Solution

The fourth proportional to 71,659.49, 107,488.89 and 18,351.36 is: 27,526.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,659.49 : 107,488.89 = 18,351.36 : x
  2. Step 2: Convert to fraction form
    71,659.49/107,488.89 = 18,351.36/x
  3. Step 3: Cross multiply
    71,659.49x = 107,488.89 × 18,351.36
  4. Step 4: Simplify right side
    71,659.49x = 1,972,567,316.39
  5. Step 5: Solve for x
    x = 1,972,567,316.39/71,659.49
  6. Step 6: Final answer
    x = 27,526.95

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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.