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Finding the Fourth Proportional to 143,676, 215,548.56 and 45,180

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Solution

The fourth proportional to 143,676, 215,548.56 and 45,180 is: 67,780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,676 : 215,548.56 = 45,180 : x
  2. Step 2: Convert to fraction form
    143,676/215,548.56 = 45,180/x
  3. Step 3: Cross multiply
    143,676x = 215,548.56 × 45,180
  4. Step 4: Simplify right side
    143,676x = 9,738,483,940.80
  5. Step 5: Solve for x
    x = 9,738,483,940.80/143,676
  6. Step 6: Final answer
    x = 67,780.87

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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.