Home / 139,235.18-192,139.40-75,571.61

Finding the Fourth Proportional to 139,235.18, 192,139.40 and 75,571.61

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Solution

The fourth proportional to 139,235.18, 192,139.40 and 75,571.61 is: 104,286.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.18 : 192,139.40 = 75,571.61 : x
  2. Step 2: Convert to fraction form
    139,235.18/192,139.40 = 75,571.61/x
  3. Step 3: Cross multiply
    139,235.18x = 192,139.40 × 75,571.61
  4. Step 4: Simplify right side
    139,235.18x = 14,520,282,463.88
  5. Step 5: Solve for x
    x = 14,520,282,463.88/139,235.18
  6. Step 6: Final answer
    x = 104,286.02

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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.