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Finding the Fourth Proportional to 231,915.20, 347,743.20 and 98,772.80

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Solution

The fourth proportional to 231,915.20, 347,743.20 and 98,772.80 is: 148,104.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,915.20 : 347,743.20 = 98,772.80 : x
  2. Step 2: Convert to fraction form
    231,915.20/347,743.20 = 98,772.80/x
  3. Step 3: Cross multiply
    231,915.20x = 347,743.20 × 98,772.80
  4. Step 4: Simplify right side
    231,915.20x = 34,347,569,544.96
  5. Step 5: Solve for x
    x = 34,347,569,544.96/231,915.20
  6. Step 6: Final answer
    x = 148,104.00

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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.