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Finding the Fourth Proportional to 221,114.88, 305,138.88 and 125,621.76

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Solution

The fourth proportional to 221,114.88, 305,138.88 and 125,621.76 is: 173,358.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,114.88 : 305,138.88 = 125,621.76 : x
  2. Step 2: Convert to fraction form
    221,114.88/305,138.88 = 125,621.76/x
  3. Step 3: Cross multiply
    221,114.88x = 305,138.88 × 125,621.76
  4. Step 4: Simplify right side
    221,114.88x = 38,332,083,150.03
  5. Step 5: Solve for x
    x = 38,332,083,150.03/221,114.88
  6. Step 6: Final answer
    x = 173,358.23

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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.