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Finding the Fourth Proportional to 41,231.20, 61,810.80 and 28,040.80

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Solution

The fourth proportional to 41,231.20, 61,810.80 and 28,040.80 is: 42,036.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,231.20 : 61,810.80 = 28,040.80 : x
  2. Step 2: Convert to fraction form
    41,231.20/61,810.80 = 28,040.80/x
  3. Step 3: Cross multiply
    41,231.20x = 61,810.80 × 28,040.80
  4. Step 4: Simplify right side
    41,231.20x = 1,733,224,280.64
  5. Step 5: Solve for x
    x = 1,733,224,280.64/41,231.20
  6. Step 6: Final answer
    x = 42,036.72

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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.