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Finding the Fourth Proportional to 168,764.40, 253,175.76 and 68,978.88

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Solution

The fourth proportional to 168,764.40, 253,175.76 and 68,978.88 is: 103,480.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,764.40 : 253,175.76 = 68,978.88 : x
  2. Step 2: Convert to fraction form
    168,764.40/253,175.76 = 68,978.88/x
  3. Step 3: Cross multiply
    168,764.40x = 253,175.76 × 68,978.88
  4. Step 4: Simplify right side
    168,764.40x = 17,463,780,367.95
  5. Step 5: Solve for x
    x = 17,463,780,367.95/168,764.40
  6. Step 6: Final answer
    x = 103,480.24

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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.