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Finding the Fourth Proportional to 221,680.59, 305,919.57 and 126,187.31

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Solution

The fourth proportional to 221,680.59, 305,919.57 and 126,187.31 is: 174,138.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,680.59 : 305,919.57 = 126,187.31 : x
  2. Step 2: Convert to fraction form
    221,680.59/305,919.57 = 126,187.31/x
  3. Step 3: Cross multiply
    221,680.59x = 305,919.57 × 126,187.31
  4. Step 4: Simplify right side
    221,680.59x = 38,603,166,085.06
  5. Step 5: Solve for x
    x = 38,603,166,085.06/221,680.59
  6. Step 6: Final answer
    x = 174,138.68

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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.