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Finding the Fourth Proportional to 68,982.61, 103,473.88 and 18,381.66

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Solution

The fourth proportional to 68,982.61, 103,473.88 and 18,381.66 is: 27,572.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,982.61 : 103,473.88 = 18,381.66 : x
  2. Step 2: Convert to fraction form
    68,982.61/103,473.88 = 18,381.66/x
  3. Step 3: Cross multiply
    68,982.61x = 103,473.88 × 18,381.66
  4. Step 4: Simplify right side
    68,982.61x = 1,902,021,589.78
  5. Step 5: Solve for x
    x = 1,902,021,589.78/68,982.61
  6. Step 6: Final answer
    x = 27,572.48

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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.