Home / 91,286.42-136,928.14-35,138.72

Finding the Fourth Proportional to 91,286.42, 136,928.14 and 35,138.72

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Solution

The fourth proportional to 91,286.42, 136,928.14 and 35,138.72 is: 52,707.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,286.42 : 136,928.14 = 35,138.72 : x
  2. Step 2: Convert to fraction form
    91,286.42/136,928.14 = 35,138.72/x
  3. Step 3: Cross multiply
    91,286.42x = 136,928.14 × 35,138.72
  4. Step 4: Simplify right side
    91,286.42x = 4,811,479,571.58
  5. Step 5: Solve for x
    x = 4,811,479,571.58/91,286.42
  6. Step 6: Final answer
    x = 52,707.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.