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Finding the Fourth Proportional to 139,343.49, 192,373.79 and 91,735.27

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Solution

The fourth proportional to 139,343.49, 192,373.79 and 91,735.27 is: 126,647.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,343.49 : 192,373.79 = 91,735.27 : x
  2. Step 2: Convert to fraction form
    139,343.49/192,373.79 = 91,735.27/x
  3. Step 3: Cross multiply
    139,343.49x = 192,373.79 × 91,735.27
  4. Step 4: Simplify right side
    139,343.49x = 17,647,460,626.96
  5. Step 5: Solve for x
    x = 17,647,460,626.96/139,343.49
  6. Step 6: Final answer
    x = 126,647.18

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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.