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Finding the Fourth Proportional to 40,486.57, 60,729.88 and 20,752.54

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Solution

The fourth proportional to 40,486.57, 60,729.88 and 20,752.54 is: 31,128.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,486.57 : 60,729.88 = 20,752.54 : x
  2. Step 2: Convert to fraction form
    40,486.57/60,729.88 = 20,752.54/x
  3. Step 3: Cross multiply
    40,486.57x = 60,729.88 × 20,752.54
  4. Step 4: Simplify right side
    40,486.57x = 1,260,299,296.94
  5. Step 5: Solve for x
    x = 1,260,299,296.94/40,486.57
  6. Step 6: Final answer
    x = 31,128.82

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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.