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Finding the Fourth Proportional to 91,408.47, 136,955.88 and 82,163.94

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Solution

The fourth proportional to 91,408.47, 136,955.88 and 82,163.94 is: 123,104.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,408.47 : 136,955.88 = 82,163.94 : x
  2. Step 2: Convert to fraction form
    91,408.47/136,955.88 = 82,163.94/x
  3. Step 3: Cross multiply
    91,408.47x = 136,955.88 × 82,163.94
  4. Step 4: Simplify right side
    91,408.47x = 11,252,834,706.97
  5. Step 5: Solve for x
    x = 11,252,834,706.97/91,408.47
  6. Step 6: Final answer
    x = 123,104.95

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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.