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Finding the Fourth Proportional to 220,916, 331,171.52 and 86,071.04

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Solution

The fourth proportional to 220,916, 331,171.52 and 86,071.04 is: 129,027.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,916 : 331,171.52 = 86,071.04 : x
  2. Step 2: Convert to fraction form
    220,916/331,171.52 = 86,071.04/x
  3. Step 3: Cross multiply
    220,916x = 331,171.52 × 86,071.04
  4. Step 4: Simplify right side
    220,916x = 28,504,277,144.78
  5. Step 5: Solve for x
    x = 28,504,277,144.78/220,916
  6. Step 6: Final answer
    x = 129,027.67

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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.