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Finding the Fourth Proportional to 69,144.60, 103,544.10 and 55,320.60

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Solution

The fourth proportional to 69,144.60, 103,544.10 and 55,320.60 is: 82,842.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,144.60 : 103,544.10 = 55,320.60 : x
  2. Step 2: Convert to fraction form
    69,144.60/103,544.10 = 55,320.60/x
  3. Step 3: Cross multiply
    69,144.60x = 103,544.10 × 55,320.60
  4. Step 4: Simplify right side
    69,144.60x = 5,728,121,738.46
  5. Step 5: Solve for x
    x = 5,728,121,738.46/69,144.60
  6. Step 6: Final answer
    x = 82,842.65

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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.