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Finding the Fourth Proportional to 40,867.20, 61,300.80 and 21,151.80

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Solution

The fourth proportional to 40,867.20, 61,300.80 and 21,151.80 is: 31,727.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,867.20 : 61,300.80 = 21,151.80 : x
  2. Step 2: Convert to fraction form
    40,867.20/61,300.80 = 21,151.80/x
  3. Step 3: Cross multiply
    40,867.20x = 61,300.80 × 21,151.80
  4. Step 4: Simplify right side
    40,867.20x = 1,296,622,261.44
  5. Step 5: Solve for x
    x = 1,296,622,261.44/40,867.20
  6. Step 6: Final answer
    x = 31,727.70

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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.