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Finding the Fourth Proportional to 71,240.18, 106,860.28 and 18,654.18

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Solution

The fourth proportional to 71,240.18, 106,860.28 and 18,654.18 is: 27,981.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,240.18 : 106,860.28 = 18,654.18 : x
  2. Step 2: Convert to fraction form
    71,240.18/106,860.28 = 18,654.18/x
  3. Step 3: Cross multiply
    71,240.18x = 106,860.28 × 18,654.18
  4. Step 4: Simplify right side
    71,240.18x = 1,993,390,897.97
  5. Step 5: Solve for x
    x = 1,993,390,897.97/71,240.18
  6. Step 6: Final answer
    x = 27,981.27

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Similar ratio
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1.5x scale

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.