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Finding the Fourth Proportional to 168,872.32, 253,088.64 and 68,915.20

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Solution

The fourth proportional to 168,872.32, 253,088.64 and 68,915.20 is: 103,283.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,872.32 : 253,088.64 = 68,915.20 : x
  2. Step 2: Convert to fraction form
    168,872.32/253,088.64 = 68,915.20/x
  3. Step 3: Cross multiply
    168,872.32x = 253,088.64 × 68,915.20
  4. Step 4: Simplify right side
    168,872.32x = 17,441,654,243.33
  5. Step 5: Solve for x
    x = 17,441,654,243.33/168,872.32
  6. Step 6: Final answer
    x = 103,283.09

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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.