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Finding the Fourth Proportional to 91,163.88, 136,770.93 and 31,991.76

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Solution

The fourth proportional to 91,163.88, 136,770.93 and 31,991.76 is: 47,996.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,163.88 : 136,770.93 = 31,991.76 : x
  2. Step 2: Convert to fraction form
    91,163.88/136,770.93 = 31,991.76/x
  3. Step 3: Cross multiply
    91,163.88x = 136,770.93 × 31,991.76
  4. Step 4: Simplify right side
    91,163.88x = 4,375,542,767.54
  5. Step 5: Solve for x
    x = 4,375,542,767.54/91,163.88
  6. Step 6: Final answer
    x = 47,996.45

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1.5x scale

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.