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Finding the Fourth Proportional to 40,699.60, 61,049.40 and 34,138.60

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Solution

The fourth proportional to 40,699.60, 61,049.40 and 34,138.60 is: 51,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,699.60 : 61,049.40 = 34,138.60 : x
  2. Step 2: Convert to fraction form
    40,699.60/61,049.40 = 34,138.60/x
  3. Step 3: Cross multiply
    40,699.60x = 61,049.40 × 34,138.60
  4. Step 4: Simplify right side
    40,699.60x = 2,084,141,046.84
  5. Step 5: Solve for x
    x = 2,084,141,046.84/40,699.60
  6. Step 6: Final answer
    x = 51,207.90

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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.