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Finding the Fourth Proportional to 71,988.60, 107,979.48 and 25,237.92

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Solution

The fourth proportional to 71,988.60, 107,979.48 and 25,237.92 is: 37,855.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,988.60 : 107,979.48 = 25,237.92 : x
  2. Step 2: Convert to fraction form
    71,988.60/107,979.48 = 25,237.92/x
  3. Step 3: Cross multiply
    71,988.60x = 107,979.48 × 25,237.92
  4. Step 4: Simplify right side
    71,988.60x = 2,725,177,477.88
  5. Step 5: Solve for x
    x = 2,725,177,477.88/71,988.60
  6. Step 6: Final answer
    x = 37,855.68

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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.