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Finding the Fourth Proportional to 68,779.80, 103,169.70 and 48,850.76

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Solution

The fourth proportional to 68,779.80, 103,169.70 and 48,850.76 is: 73,276.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,779.80 : 103,169.70 = 48,850.76 : x
  2. Step 2: Convert to fraction form
    68,779.80/103,169.70 = 48,850.76/x
  3. Step 3: Cross multiply
    68,779.80x = 103,169.70 × 48,850.76
  4. Step 4: Simplify right side
    68,779.80x = 5,039,918,511.90
  5. Step 5: Solve for x
    x = 5,039,918,511.90/68,779.80
  6. Step 6: Final answer
    x = 73,276.14

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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.