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Finding the Fourth Proportional to 82,480.85, 123,679.75 and 40,297.72

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Solution

The fourth proportional to 82,480.85, 123,679.75 and 40,297.72 is: 60,426.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,480.85 : 123,679.75 = 40,297.72 : x
  2. Step 2: Convert to fraction form
    82,480.85/123,679.75 = 40,297.72/x
  3. Step 3: Cross multiply
    82,480.85x = 123,679.75 × 40,297.72
  4. Step 4: Simplify right side
    82,480.85x = 4,984,011,525.23
  5. Step 5: Solve for x
    x = 4,984,011,525.23/82,480.85
  6. Step 6: Final answer
    x = 60,426.29

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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.