Home / 81,000.81-111,761.64-49,163.76

Finding the Fourth Proportional to 81,000.81, 111,761.64 and 49,163.76

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Solution

The fourth proportional to 81,000.81, 111,761.64 and 49,163.76 is: 67,834.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.81 : 111,761.64 = 49,163.76 : x
  2. Step 2: Convert to fraction form
    81,000.81/111,761.64 = 49,163.76/x
  3. Step 3: Cross multiply
    81,000.81x = 111,761.64 × 49,163.76
  4. Step 4: Simplify right side
    81,000.81x = 5,494,622,446.17
  5. Step 5: Solve for x
    x = 5,494,622,446.17/81,000.81
  6. Step 6: Final answer
    x = 67,834.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.