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Finding the Fourth Proportional to 40,690.60, 61,079.04 and 36,040.78

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Solution

The fourth proportional to 40,690.60, 61,079.04 and 36,040.78 is: 54,099.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,690.60 : 61,079.04 = 36,040.78 : x
  2. Step 2: Convert to fraction form
    40,690.60/61,079.04 = 36,040.78/x
  3. Step 3: Cross multiply
    40,690.60x = 61,079.04 × 36,040.78
  4. Step 4: Simplify right side
    40,690.60x = 2,201,336,243.25
  5. Step 5: Solve for x
    x = 2,201,336,243.25/40,690.60
  6. Step 6: Final answer
    x = 54,099.38

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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.