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Finding the Fourth Proportional to 71,479.53, 98,644.97 and 39,648.42

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Solution

The fourth proportional to 71,479.53, 98,644.97 and 39,648.42 is: 54,716.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,479.53 : 98,644.97 = 39,648.42 : x
  2. Step 2: Convert to fraction form
    71,479.53/98,644.97 = 39,648.42/x
  3. Step 3: Cross multiply
    71,479.53x = 98,644.97 × 39,648.42
  4. Step 4: Simplify right side
    71,479.53x = 3,911,117,300.57
  5. Step 5: Solve for x
    x = 3,911,117,300.57/71,479.53
  6. Step 6: Final answer
    x = 54,716.61

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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.