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Finding the Fourth Proportional to 41,100.80, 61,651.20 and 28,659.20

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Solution

The fourth proportional to 41,100.80, 61,651.20 and 28,659.20 is: 42,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,100.80 : 61,651.20 = 28,659.20 : x
  2. Step 2: Convert to fraction form
    41,100.80/61,651.20 = 28,659.20/x
  3. Step 3: Cross multiply
    41,100.80x = 61,651.20 × 28,659.20
  4. Step 4: Simplify right side
    41,100.80x = 1,766,874,071.04
  5. Step 5: Solve for x
    x = 1,766,874,071.04/41,100.80
  6. Step 6: Final answer
    x = 42,988.80

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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.