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Finding the Fourth Proportional to 71,081.75, 98,090.60 and 39,248.15

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Solution

The fourth proportional to 71,081.75, 98,090.60 and 39,248.15 is: 54,161.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,081.75 : 98,090.60 = 39,248.15 : x
  2. Step 2: Convert to fraction form
    71,081.75/98,090.60 = 39,248.15/x
  3. Step 3: Cross multiply
    71,081.75x = 98,090.60 × 39,248.15
  4. Step 4: Simplify right side
    71,081.75x = 3,849,873,895.70
  5. Step 5: Solve for x
    x = 3,849,873,895.70/71,081.75
  6. Step 6: Final answer
    x = 54,161.21

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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.