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Finding the Fourth Proportional to 68,792.72, 103,189.08 and 55,029.20

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Solution

The fourth proportional to 68,792.72, 103,189.08 and 55,029.20 is: 82,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.72 : 103,189.08 = 55,029.20 : x
  2. Step 2: Convert to fraction form
    68,792.72/103,189.08 = 55,029.20/x
  3. Step 3: Cross multiply
    68,792.72x = 103,189.08 × 55,029.20
  4. Step 4: Simplify right side
    68,792.72x = 5,678,412,521.14
  5. Step 5: Solve for x
    x = 5,678,412,521.14/68,792.72
  6. Step 6: Final answer
    x = 82,543.80

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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.