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Finding the Fourth Proportional to 71,197.52, 106,792.60 and 21,278.04

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Solution

The fourth proportional to 71,197.52, 106,792.60 and 21,278.04 is: 31,915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,197.52 : 106,792.60 = 21,278.04 : x
  2. Step 2: Convert to fraction form
    71,197.52/106,792.60 = 21,278.04/x
  3. Step 3: Cross multiply
    71,197.52x = 106,792.60 × 21,278.04
  4. Step 4: Simplify right side
    71,197.52x = 2,272,337,214.50
  5. Step 5: Solve for x
    x = 2,272,337,214.50/71,197.52
  6. Step 6: Final answer
    x = 31,915.96

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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.