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Finding the Fourth Proportional to 221,878.38, 306,157.94 and 126,372.90

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Solution

The fourth proportional to 221,878.38, 306,157.94 and 126,372.90 is: 174,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,878.38 : 306,157.94 = 126,372.90 : x
  2. Step 2: Convert to fraction form
    221,878.38/306,157.94 = 126,372.90/x
  3. Step 3: Cross multiply
    221,878.38x = 306,157.94 × 126,372.90
  4. Step 4: Simplify right side
    221,878.38x = 38,690,066,735.83
  5. Step 5: Solve for x
    x = 38,690,066,735.83/221,878.38
  6. Step 6: Final answer
    x = 174,375.11

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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.