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Finding the Fourth Proportional to 68,790.72, 103,186.08 and 55,027.20

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Solution

The fourth proportional to 68,790.72, 103,186.08 and 55,027.20 is: 82,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.72 : 103,186.08 = 55,027.20 : x
  2. Step 2: Convert to fraction form
    68,790.72/103,186.08 = 55,027.20/x
  3. Step 3: Cross multiply
    68,790.72x = 103,186.08 × 55,027.20
  4. Step 4: Simplify right side
    68,790.72x = 5,678,041,061.38
  5. Step 5: Solve for x
    x = 5,678,041,061.38/68,790.72
  6. Step 6: Final answer
    x = 82,540.80

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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.