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Finding the Fourth Proportional to 168,622.64, 252,961.41 and 78,755.22

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Solution

The fourth proportional to 168,622.64, 252,961.41 and 78,755.22 is: 118,145.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,622.64 : 252,961.41 = 78,755.22 : x
  2. Step 2: Convert to fraction form
    168,622.64/252,961.41 = 78,755.22/x
  3. Step 3: Cross multiply
    168,622.64x = 252,961.41 × 78,755.22
  4. Step 4: Simplify right side
    168,622.64x = 19,922,031,496.06
  5. Step 5: Solve for x
    x = 19,922,031,496.06/168,622.64
  6. Step 6: Final answer
    x = 118,145.65

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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.