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Finding the Fourth Proportional to 68,561.20, 102,880.20 and 29,111.60

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Solution

The fourth proportional to 68,561.20, 102,880.20 and 29,111.60 is: 43,683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,561.20 : 102,880.20 = 29,111.60 : x
  2. Step 2: Convert to fraction form
    68,561.20/102,880.20 = 29,111.60/x
  3. Step 3: Cross multiply
    68,561.20x = 102,880.20 × 29,111.60
  4. Step 4: Simplify right side
    68,561.20x = 2,995,007,230.32
  5. Step 5: Solve for x
    x = 2,995,007,230.32/68,561.20
  6. Step 6: Final answer
    x = 43,683.70

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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.