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Finding the Fourth Proportional to 172,498.92, 258,660.60 and 78,924.48

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Solution

The fourth proportional to 172,498.92, 258,660.60 and 78,924.48 is: 118,346.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,498.92 : 258,660.60 = 78,924.48 : x
  2. Step 2: Convert to fraction form
    172,498.92/258,660.60 = 78,924.48/x
  3. Step 3: Cross multiply
    172,498.92x = 258,660.60 × 78,924.48
  4. Step 4: Simplify right side
    172,498.92x = 20,414,653,351.49
  5. Step 5: Solve for x
    x = 20,414,653,351.49/172,498.92
  6. Step 6: Final answer
    x = 118,346.56

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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.