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Finding the Fourth Proportional to 123,650.96, 170,584.13 and 72,640.67

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Solution

The fourth proportional to 123,650.96, 170,584.13 and 72,640.67 is: 100,212.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,650.96 : 170,584.13 = 72,640.67 : x
  2. Step 2: Convert to fraction form
    123,650.96/170,584.13 = 72,640.67/x
  3. Step 3: Cross multiply
    123,650.96x = 170,584.13 × 72,640.67
  4. Step 4: Simplify right side
    123,650.96x = 12,391,346,102.63
  5. Step 5: Solve for x
    x = 12,391,346,102.63/123,650.96
  6. Step 6: Final answer
    x = 100,212.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.