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Finding the Fourth Proportional to 118,961.21, 164,170.65 and 65,246.44

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Solution

The fourth proportional to 118,961.21, 164,170.65 and 65,246.44 is: 90,042.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,961.21 : 164,170.65 = 65,246.44 : x
  2. Step 2: Convert to fraction form
    118,961.21/164,170.65 = 65,246.44/x
  3. Step 3: Cross multiply
    118,961.21x = 164,170.65 × 65,246.44
  4. Step 4: Simplify right side
    118,961.21x = 10,711,549,778.31
  5. Step 5: Solve for x
    x = 10,711,549,778.31/118,961.21
  6. Step 6: Final answer
    x = 90,042.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.