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Finding the Fourth Proportional to 139,235.55, 192,139.91 and 75,571.98

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Solution

The fourth proportional to 139,235.55, 192,139.91 and 75,571.98 is: 104,286.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.55 : 192,139.91 = 75,571.98 : x
  2. Step 2: Convert to fraction form
    139,235.55/192,139.91 = 75,571.98/x
  3. Step 3: Cross multiply
    139,235.55x = 192,139.91 × 75,571.98
  4. Step 4: Simplify right side
    139,235.55x = 14,520,392,620.73
  5. Step 5: Solve for x
    x = 14,520,392,620.73/139,235.55
  6. Step 6: Final answer
    x = 104,286.53

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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.