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Finding the Fourth Proportional to 72,078.66, 108,169.02 and 25,335.18

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Solution

The fourth proportional to 72,078.66, 108,169.02 and 25,335.18 is: 38,020.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,078.66 : 108,169.02 = 25,335.18 : x
  2. Step 2: Convert to fraction form
    72,078.66/108,169.02 = 25,335.18/x
  3. Step 3: Cross multiply
    72,078.66x = 108,169.02 × 25,335.18
  4. Step 4: Simplify right side
    72,078.66x = 2,740,481,592.12
  5. Step 5: Solve for x
    x = 2,740,481,592.12/72,078.66
  6. Step 6: Final answer
    x = 38,020.71

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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.