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Finding the Fourth Proportional to 220,960.31, 331,573.70 and 78,794.78

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Solution

The fourth proportional to 220,960.31, 331,573.70 and 78,794.78 is: 118,239.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,960.31 : 331,573.70 = 78,794.78 : x
  2. Step 2: Convert to fraction form
    220,960.31/331,573.70 = 78,794.78/x
  3. Step 3: Cross multiply
    220,960.31x = 331,573.70 × 78,794.78
  4. Step 4: Simplify right side
    220,960.31x = 26,126,275,284.40
  5. Step 5: Solve for x
    x = 26,126,275,284.40/220,960.31
  6. Step 6: Final answer
    x = 118,239.68

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1.5x scale

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.