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Finding the Fourth Proportional to 221,105.80, 331,658.70 and 127,502.20

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Solution

The fourth proportional to 221,105.80, 331,658.70 and 127,502.20 is: 191,253.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,105.80 : 331,658.70 = 127,502.20 : x
  2. Step 2: Convert to fraction form
    221,105.80/331,658.70 = 127,502.20/x
  3. Step 3: Cross multiply
    221,105.80x = 331,658.70 × 127,502.20
  4. Step 4: Simplify right side
    221,105.80x = 42,287,213,899.14
  5. Step 5: Solve for x
    x = 42,287,213,899.14/221,105.80
  6. Step 6: Final answer
    x = 191,253.30

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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.