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Finding the Fourth Proportional to 71,141.20, 106,717.20 and 21,217.40

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Solution

The fourth proportional to 71,141.20, 106,717.20 and 21,217.40 is: 31,827.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,141.20 : 106,717.20 = 21,217.40 : x
  2. Step 2: Convert to fraction form
    71,141.20/106,717.20 = 21,217.40/x
  3. Step 3: Cross multiply
    71,141.20x = 106,717.20 × 21,217.40
  4. Step 4: Simplify right side
    71,141.20x = 2,264,261,519.28
  5. Step 5: Solve for x
    x = 2,264,261,519.28/71,141.20
  6. Step 6: Final answer
    x = 31,827.71

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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.