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Finding the Fourth Proportional to 139,550.76, 192,576 and 79,127.16

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Solution

The fourth proportional to 139,550.76, 192,576 and 79,127.16 is: 109,193.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,550.76 : 192,576 = 79,127.16 : x
  2. Step 2: Convert to fraction form
    139,550.76/192,576 = 79,127.16/x
  3. Step 3: Cross multiply
    139,550.76x = 192,576 × 79,127.16
  4. Step 4: Simplify right side
    139,550.76x = 15,237,991,964.16
  5. Step 5: Solve for x
    x = 15,237,991,964.16/139,550.76
  6. Step 6: Final answer
    x = 109,193.19

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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.