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Finding the Fourth Proportional to 221,512.88, 332,071.72 and 81,238.96

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Solution

The fourth proportional to 221,512.88, 332,071.72 and 81,238.96 is: 121,785.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,512.88 : 332,071.72 = 81,238.96 : x
  2. Step 2: Convert to fraction form
    221,512.88/332,071.72 = 81,238.96/x
  3. Step 3: Cross multiply
    221,512.88x = 332,071.72 × 81,238.96
  4. Step 4: Simplify right side
    221,512.88x = 26,977,161,178.21
  5. Step 5: Solve for x
    x = 26,977,161,178.21/221,512.88
  6. Step 6: Final answer
    x = 121,785.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.