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Finding the Fourth Proportional to 143,842.70, 215,614.33 and 80,570.05

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Solution

The fourth proportional to 143,842.70, 215,614.33 and 80,570.05 is: 120,771.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,842.70 : 215,614.33 = 80,570.05 : x
  2. Step 2: Convert to fraction form
    143,842.70/215,614.33 = 80,570.05/x
  3. Step 3: Cross multiply
    143,842.70x = 215,614.33 × 80,570.05
  4. Step 4: Simplify right side
    143,842.70x = 17,372,056,608.36
  5. Step 5: Solve for x
    x = 17,372,056,608.36/143,842.70
  6. Step 6: Final answer
    x = 120,771.21

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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.