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Finding the Fourth Proportional to 40,704.80, 61,057.20 and 30,207.20

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Solution

The fourth proportional to 40,704.80, 61,057.20 and 30,207.20 is: 45,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,704.80 : 61,057.20 = 30,207.20 : x
  2. Step 2: Convert to fraction form
    40,704.80/61,057.20 = 30,207.20/x
  3. Step 3: Cross multiply
    40,704.80x = 61,057.20 × 30,207.20
  4. Step 4: Simplify right side
    40,704.80x = 1,844,367,051.84
  5. Step 5: Solve for x
    x = 1,844,367,051.84/40,704.80
  6. Step 6: Final answer
    x = 45,310.80

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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.