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Finding the Fourth Proportional to 122,442.30, 168,958.71 and 68,715

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Solution

The fourth proportional to 122,442.30, 168,958.71 and 68,715 is: 94,820.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,442.30 : 168,958.71 = 68,715 : x
  2. Step 2: Convert to fraction form
    122,442.30/168,958.71 = 68,715/x
  3. Step 3: Cross multiply
    122,442.30x = 168,958.71 × 68,715
  4. Step 4: Simplify right side
    122,442.30x = 11,609,997,757.65
  5. Step 5: Solve for x
    x = 11,609,997,757.65/122,442.30
  6. Step 6: Final answer
    x = 94,820.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.