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Finding the Fourth Proportional to 143,786.43, 215,679.80 and 143,578.77

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Solution

The fourth proportional to 143,786.43, 215,679.80 and 143,578.77 is: 215,368.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,786.43 : 215,679.80 = 143,578.77 : x
  2. Step 2: Convert to fraction form
    143,786.43/215,679.80 = 143,578.77/x
  3. Step 3: Cross multiply
    143,786.43x = 215,679.80 × 143,578.77
  4. Step 4: Simplify right side
    143,786.43x = 30,967,040,397.85
  5. Step 5: Solve for x
    x = 30,967,040,397.85/143,786.43
  6. Step 6: Final answer
    x = 215,368.31

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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.