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Finding the Fourth Proportional to 71,449.56, 98,605.35 and 39,621.42

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Solution

The fourth proportional to 71,449.56, 98,605.35 and 39,621.42 is: 54,680.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,449.56 : 98,605.35 = 39,621.42 : x
  2. Step 2: Convert to fraction form
    71,449.56/98,605.35 = 39,621.42/x
  3. Step 3: Cross multiply
    71,449.56x = 98,605.35 × 39,621.42
  4. Step 4: Simplify right side
    71,449.56x = 3,906,883,986.60
  5. Step 5: Solve for x
    x = 3,906,883,986.60/71,449.56
  6. Step 6: Final answer
    x = 54,680.31

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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.