Home / 220,961.16-331,480.70-80,915.40

Finding the Fourth Proportional to 220,961.16, 331,480.70 and 80,915.40

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Solution

The fourth proportional to 220,961.16, 331,480.70 and 80,915.40 is: 121,387.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,961.16 : 331,480.70 = 80,915.40 : x
  2. Step 2: Convert to fraction form
    220,961.16/331,480.70 = 80,915.40/x
  3. Step 3: Cross multiply
    220,961.16x = 331,480.70 × 80,915.40
  4. Step 4: Simplify right side
    220,961.16x = 26,821,893,432.78
  5. Step 5: Solve for x
    x = 26,821,893,432.78/220,961.16
  6. Step 6: Final answer
    x = 121,387.37

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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.