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Finding the Fourth Proportional to 103,400.80, 155,010.48 and 53,375.20

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Solution

The fourth proportional to 103,400.80, 155,010.48 and 53,375.20 is: 80,015.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,400.80 : 155,010.48 = 53,375.20 : x
  2. Step 2: Convert to fraction form
    103,400.80/155,010.48 = 53,375.20/x
  3. Step 3: Cross multiply
    103,400.80x = 155,010.48 × 53,375.20
  4. Step 4: Simplify right side
    103,400.80x = 8,273,715,372.10
  5. Step 5: Solve for x
    x = 8,273,715,372.10/103,400.80
  6. Step 6: Final answer
    x = 80,015.97

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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.