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Finding the Fourth Proportional to 85,163.70, 127,745.55 and 76,869.30

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Solution

The fourth proportional to 85,163.70, 127,745.55 and 76,869.30 is: 115,303.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,163.70 : 127,745.55 = 76,869.30 : x
  2. Step 2: Convert to fraction form
    85,163.70/127,745.55 = 76,869.30/x
  3. Step 3: Cross multiply
    85,163.70x = 127,745.55 × 76,869.30
  4. Step 4: Simplify right side
    85,163.70x = 9,819,711,006.62
  5. Step 5: Solve for x
    x = 9,819,711,006.62/85,163.70
  6. Step 6: Final answer
    x = 115,303.95

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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.