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Finding the Fourth Proportional to 71,049.71, 98,048.60 and 39,218.61

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Solution

The fourth proportional to 71,049.71, 98,048.60 and 39,218.61 is: 54,121.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,049.71 : 98,048.60 = 39,218.61 : x
  2. Step 2: Convert to fraction form
    71,049.71/98,048.60 = 39,218.61/x
  3. Step 3: Cross multiply
    71,049.71x = 98,048.60 × 39,218.61
  4. Step 4: Simplify right side
    71,049.71x = 3,845,329,804.45
  5. Step 5: Solve for x
    x = 3,845,329,804.45/71,049.71
  6. Step 6: Final answer
    x = 54,121.68

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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.