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Finding the Fourth Proportional to 45,711.80, 68,682.90 and 29,079.80

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Solution

The fourth proportional to 45,711.80, 68,682.90 and 29,079.80 is: 43,692.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,711.80 : 68,682.90 = 29,079.80 : x
  2. Step 2: Convert to fraction form
    45,711.80/68,682.90 = 29,079.80/x
  3. Step 3: Cross multiply
    45,711.80x = 68,682.90 × 29,079.80
  4. Step 4: Simplify right side
    45,711.80x = 1,997,284,995.42
  5. Step 5: Solve for x
    x = 1,997,284,995.42/45,711.80
  6. Step 6: Final answer
    x = 43,692.99

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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.