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Finding the Fourth Proportional to 81,830.55, 122,806.67 and 60,819.51

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Solution

The fourth proportional to 81,830.55, 122,806.67 and 60,819.51 is: 91,274.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,830.55 : 122,806.67 = 60,819.51 : x
  2. Step 2: Convert to fraction form
    81,830.55/122,806.67 = 60,819.51/x
  3. Step 3: Cross multiply
    81,830.55x = 122,806.67 × 60,819.51
  4. Step 4: Simplify right side
    81,830.55x = 7,469,041,190.03
  5. Step 5: Solve for x
    x = 7,469,041,190.03/81,830.55
  6. Step 6: Final answer
    x = 91,274.48

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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.