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Finding the Fourth Proportional to 68,877.30, 103,121.55 and 66,933.30

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Solution

The fourth proportional to 68,877.30, 103,121.55 and 66,933.30 is: 100,211.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,877.30 : 103,121.55 = 66,933.30 : x
  2. Step 2: Convert to fraction form
    68,877.30/103,121.55 = 66,933.30/x
  3. Step 3: Cross multiply
    68,877.30x = 103,121.55 × 66,933.30
  4. Step 4: Simplify right side
    68,877.30x = 6,902,265,642.62
  5. Step 5: Solve for x
    x = 6,902,265,642.62/68,877.30
  6. Step 6: Final answer
    x = 100,211.04

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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.