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Finding the Fourth Proportional to 68,792.20, 103,091.10 and 42,418.60

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Solution

The fourth proportional to 68,792.20, 103,091.10 and 42,418.60 is: 63,567.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,792.20 : 103,091.10 = 42,418.60 : x
  2. Step 2: Convert to fraction form
    68,792.20/103,091.10 = 42,418.60/x
  3. Step 3: Cross multiply
    68,792.20x = 103,091.10 × 42,418.60
  4. Step 4: Simplify right side
    68,792.20x = 4,372,980,134.46
  5. Step 5: Solve for x
    x = 4,372,980,134.46/68,792.20
  6. Step 6: Final answer
    x = 63,567.96

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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.