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Finding the Fourth Proportional to 69,144.88, 103,620.08 and 39,518.32

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Solution

The fourth proportional to 69,144.88, 103,620.08 and 39,518.32 is: 59,221.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,144.88 : 103,620.08 = 39,518.32 : x
  2. Step 2: Convert to fraction form
    69,144.88/103,620.08 = 39,518.32/x
  3. Step 3: Cross multiply
    69,144.88x = 103,620.08 × 39,518.32
  4. Step 4: Simplify right side
    69,144.88x = 4,094,891,479.87
  5. Step 5: Solve for x
    x = 4,094,891,479.87/69,144.88
  6. Step 6: Final answer
    x = 59,221.90

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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.