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Finding the Fourth Proportional to 143,379.40, 214,996.20 and 84,233.20

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Solution

The fourth proportional to 143,379.40, 214,996.20 and 84,233.20 is: 126,306.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,379.40 : 214,996.20 = 84,233.20 : x
  2. Step 2: Convert to fraction form
    143,379.40/214,996.20 = 84,233.20/x
  3. Step 3: Cross multiply
    143,379.40x = 214,996.20 × 84,233.20
  4. Step 4: Simplify right side
    143,379.40x = 18,109,817,913.84
  5. Step 5: Solve for x
    x = 18,109,817,913.84/143,379.40
  6. Step 6: Final answer
    x = 126,306.97

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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.