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Finding the Fourth Proportional to 71,352.88, 98,469.70 and 39,521.10

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Solution

The fourth proportional to 71,352.88, 98,469.70 and 39,521.10 is: 54,540.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,352.88 : 98,469.70 = 39,521.10 : x
  2. Step 2: Convert to fraction form
    71,352.88/98,469.70 = 39,521.10/x
  3. Step 3: Cross multiply
    71,352.88x = 98,469.70 × 39,521.10
  4. Step 4: Simplify right side
    71,352.88x = 3,891,630,860.67
  5. Step 5: Solve for x
    x = 3,891,630,860.67/71,352.88
  6. Step 6: Final answer
    x = 54,540.63

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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.