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Finding the Fourth Proportional to 67,284.60, 100,816.20 and 40,909.92

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Solution

The fourth proportional to 67,284.60, 100,816.20 and 40,909.92 is: 61,297.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,284.60 : 100,816.20 = 40,909.92 : x
  2. Step 2: Convert to fraction form
    67,284.60/100,816.20 = 40,909.92/x
  3. Step 3: Cross multiply
    67,284.60x = 100,816.20 × 40,909.92
  4. Step 4: Simplify right side
    67,284.60x = 4,124,382,676.70
  5. Step 5: Solve for x
    x = 4,124,382,676.70/67,284.60
  6. Step 6: Final answer
    x = 61,297.57

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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.