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Finding the Fourth Proportional to 221,781.52, 306,058.50 and 121,179.52

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Solution

The fourth proportional to 221,781.52, 306,058.50 and 121,179.52 is: 167,227.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,781.52 : 306,058.50 = 121,179.52 : x
  2. Step 2: Convert to fraction form
    221,781.52/306,058.50 = 121,179.52/x
  3. Step 3: Cross multiply
    221,781.52x = 306,058.50 × 121,179.52
  4. Step 4: Simplify right side
    221,781.52x = 37,088,022,121.92
  5. Step 5: Solve for x
    x = 37,088,022,121.92/221,781.52
  6. Step 6: Final answer
    x = 167,227.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.