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Finding the Fourth Proportional to 91,163.40, 136,680.30 and 34,981.80

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Solution

The fourth proportional to 91,163.40, 136,680.30 and 34,981.80 is: 52,447.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,163.40 : 136,680.30 = 34,981.80 : x
  2. Step 2: Convert to fraction form
    91,163.40/136,680.30 = 34,981.80/x
  3. Step 3: Cross multiply
    91,163.40x = 136,680.30 × 34,981.80
  4. Step 4: Simplify right side
    91,163.40x = 4,781,322,918.54
  5. Step 5: Solve for x
    x = 4,781,322,918.54/91,163.40
  6. Step 6: Final answer
    x = 52,447.83

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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.