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Finding the Fourth Proportional to 221,335.34, 305,439.15 and 125,839.98

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Solution

The fourth proportional to 221,335.34, 305,439.15 and 125,839.98 is: 173,657.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,335.34 : 305,439.15 = 125,839.98 : x
  2. Step 2: Convert to fraction form
    221,335.34/305,439.15 = 125,839.98/x
  3. Step 3: Cross multiply
    221,335.34x = 305,439.15 × 125,839.98
  4. Step 4: Simplify right side
    221,335.34x = 38,436,456,999.12
  5. Step 5: Solve for x
    x = 38,436,456,999.12/221,335.34
  6. Step 6: Final answer
    x = 173,657.12

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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.