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Finding the Fourth Proportional to 71,203.73, 106,811.66 and 18,613.13

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Solution

The fourth proportional to 71,203.73, 106,811.66 and 18,613.13 is: 27,921.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,203.73 : 106,811.66 = 18,613.13 : x
  2. Step 2: Convert to fraction form
    71,203.73/106,811.66 = 18,613.13/x
  3. Step 3: Cross multiply
    71,203.73x = 106,811.66 × 18,613.13
  4. Step 4: Simplify right side
    71,203.73x = 1,988,098,825.57
  5. Step 5: Solve for x
    x = 1,988,098,825.57/71,203.73
  6. Step 6: Final answer
    x = 27,921.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.