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Finding the Fourth Proportional to 185,987.96, 278,976.78 and 67,661.48

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Solution

The fourth proportional to 185,987.96, 278,976.78 and 67,661.48 is: 101,490.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,987.96 : 278,976.78 = 67,661.48 : x
  2. Step 2: Convert to fraction form
    185,987.96/278,976.78 = 67,661.48/x
  3. Step 3: Cross multiply
    185,987.96x = 278,976.78 × 67,661.48
  4. Step 4: Simplify right side
    185,987.96x = 18,875,981,820.43
  5. Step 5: Solve for x
    x = 18,875,981,820.43/185,987.96
  6. Step 6: Final answer
    x = 101,490.34

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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.