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Finding the Fourth Proportional to 68,706.20, 103,059.30 and 66,081.80

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Solution

The fourth proportional to 68,706.20, 103,059.30 and 66,081.80 is: 99,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,706.20 : 103,059.30 = 66,081.80 : x
  2. Step 2: Convert to fraction form
    68,706.20/103,059.30 = 66,081.80/x
  3. Step 3: Cross multiply
    68,706.20x = 103,059.30 × 66,081.80
  4. Step 4: Simplify right side
    68,706.20x = 6,810,344,050.74
  5. Step 5: Solve for x
    x = 6,810,344,050.74/68,706.20
  6. Step 6: Final answer
    x = 99,122.70

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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.