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Finding the Fourth Proportional to 40,751.46, 61,118.19 and 20,739.69

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Solution

The fourth proportional to 40,751.46, 61,118.19 and 20,739.69 is: 31,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,751.46 : 61,118.19 = 20,739.69 : x
  2. Step 2: Convert to fraction form
    40,751.46/61,118.19 = 20,739.69/x
  3. Step 3: Cross multiply
    40,751.46x = 61,118.19 × 20,739.69
  4. Step 4: Simplify right side
    40,751.46x = 1,267,572,313.96
  5. Step 5: Solve for x
    x = 1,267,572,313.96/40,751.46
  6. Step 6: Final answer
    x = 31,104.95

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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.