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Finding the Fourth Proportional to 221,487.90, 305,682.51 and 125,976.15

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Solution

The fourth proportional to 221,487.90, 305,682.51 and 125,976.15 is: 173,863.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,487.90 : 305,682.51 = 125,976.15 : x
  2. Step 2: Convert to fraction form
    221,487.90/305,682.51 = 125,976.15/x
  3. Step 3: Cross multiply
    221,487.90x = 305,682.51 × 125,976.15
  4. Step 4: Simplify right side
    221,487.90x = 38,508,705,732.14
  5. Step 5: Solve for x
    x = 38,508,705,732.14/221,487.90
  6. Step 6: Final answer
    x = 173,863.70

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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.