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Finding the Fourth Proportional to 343,915.20, 515,872.80 and 91,195.20

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Solution

The fourth proportional to 343,915.20, 515,872.80 and 91,195.20 is: 136,792.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,915.20 : 515,872.80 = 91,195.20 : x
  2. Step 2: Convert to fraction form
    343,915.20/515,872.80 = 91,195.20/x
  3. Step 3: Cross multiply
    343,915.20x = 515,872.80 × 91,195.20
  4. Step 4: Simplify right side
    343,915.20x = 47,045,123,170.56
  5. Step 5: Solve for x
    x = 47,045,123,170.56/343,915.20
  6. Step 6: Final answer
    x = 136,792.80

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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.