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Finding the Fourth Proportional to 66,839, 92,237.84 and 39,982.64

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Solution

The fourth proportional to 66,839, 92,237.84 and 39,982.64 is: 55,176.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,839 : 92,237.84 = 39,982.64 : x
  2. Step 2: Convert to fraction form
    66,839/92,237.84 = 39,982.64/x
  3. Step 3: Cross multiply
    66,839x = 92,237.84 × 39,982.64
  4. Step 4: Simplify right side
    66,839x = 3,687,912,351.10
  5. Step 5: Solve for x
    x = 3,687,912,351.10/66,839
  6. Step 6: Final answer
    x = 55,176.06

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1.5x scale

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.