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Finding the Fourth Proportional to 121,687.77, 182,087.60 and 71,791.77

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Solution

The fourth proportional to 121,687.77, 182,087.60 and 71,791.77 is: 107,425.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,687.77 : 182,087.60 = 71,791.77 : x
  2. Step 2: Convert to fraction form
    121,687.77/182,087.60 = 71,791.77/x
  3. Step 3: Cross multiply
    121,687.77x = 182,087.60 × 71,791.77
  4. Step 4: Simplify right side
    121,687.77x = 13,072,390,740.09
  5. Step 5: Solve for x
    x = 13,072,390,740.09/121,687.77
  6. Step 6: Final answer
    x = 107,425.67

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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.