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Finding the Fourth Proportional to 68,902.40, 103,255.20 and 39,257.60

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Solution

The fourth proportional to 68,902.40, 103,255.20 and 39,257.60 is: 58,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,902.40 : 103,255.20 = 39,257.60 : x
  2. Step 2: Convert to fraction form
    68,902.40/103,255.20 = 39,257.60/x
  3. Step 3: Cross multiply
    68,902.40x = 103,255.20 × 39,257.60
  4. Step 4: Simplify right side
    68,902.40x = 4,053,551,339.52
  5. Step 5: Solve for x
    x = 4,053,551,339.52/68,902.40
  6. Step 6: Final answer
    x = 58,830.34

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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.