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Finding the Fourth Proportional to 71,378.74, 98,494.45 and 39,539.54

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Solution

The fourth proportional to 71,378.74, 98,494.45 and 39,539.54 is: 54,560.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.74 : 98,494.45 = 39,539.54 : x
  2. Step 2: Convert to fraction form
    71,378.74/98,494.45 = 39,539.54/x
  3. Step 3: Cross multiply
    71,378.74x = 98,494.45 × 39,539.54
  4. Step 4: Simplify right side
    71,378.74x = 3,894,425,245.55
  5. Step 5: Solve for x
    x = 3,894,425,245.55/71,378.74
  6. Step 6: Final answer
    x = 54,560.02

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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.