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Finding the Fourth Proportional to 68,790.80, 103,200.60 and 27,238.16

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Solution

The fourth proportional to 68,790.80, 103,200.60 and 27,238.16 is: 40,862.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.80 : 103,200.60 = 27,238.16 : x
  2. Step 2: Convert to fraction form
    68,790.80/103,200.60 = 27,238.16/x
  3. Step 3: Cross multiply
    68,790.80x = 103,200.60 × 27,238.16
  4. Step 4: Simplify right side
    68,790.80x = 2,810,994,454.90
  5. Step 5: Solve for x
    x = 2,810,994,454.90/68,790.80
  6. Step 6: Final answer
    x = 40,862.94

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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.