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Finding the Fourth Proportional to 139,208.50, 192,107.87 and 75,546.31

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Solution

The fourth proportional to 139,208.50, 192,107.87 and 75,546.31 is: 104,253.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,208.50 : 192,107.87 = 75,546.31 : x
  2. Step 2: Convert to fraction form
    139,208.50/192,107.87 = 75,546.31/x
  3. Step 3: Cross multiply
    139,208.50x = 192,107.87 × 75,546.31
  4. Step 4: Simplify right side
    139,208.50x = 14,513,040,322.73
  5. Step 5: Solve for x
    x = 14,513,040,322.73/139,208.50
  6. Step 6: Final answer
    x = 104,253.98

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1.5x scale

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.