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Finding the Fourth Proportional to 168,820.80, 253,231.20 and 68,915.40

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Solution

The fourth proportional to 168,820.80, 253,231.20 and 68,915.40 is: 103,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,820.80 : 253,231.20 = 68,915.40 : x
  2. Step 2: Convert to fraction form
    168,820.80/253,231.20 = 68,915.40/x
  3. Step 3: Cross multiply
    168,820.80x = 253,231.20 × 68,915.40
  4. Step 4: Simplify right side
    168,820.80x = 17,451,529,440.48
  5. Step 5: Solve for x
    x = 17,451,529,440.48/168,820.80
  6. Step 6: Final answer
    x = 103,373.10

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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.