Home / 81,107.74-111,931.08-47,121.76

Finding the Fourth Proportional to 81,107.74, 111,931.08 and 47,121.76

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Solution

The fourth proportional to 81,107.74, 111,931.08 and 47,121.76 is: 65,029.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,107.74 : 111,931.08 = 47,121.76 : x
  2. Step 2: Convert to fraction form
    81,107.74/111,931.08 = 47,121.76/x
  3. Step 3: Cross multiply
    81,107.74x = 111,931.08 × 47,121.76
  4. Step 4: Simplify right side
    81,107.74x = 5,274,388,928.65
  5. Step 5: Solve for x
    x = 5,274,388,928.65/81,107.74
  6. Step 6: Final answer
    x = 65,029.42

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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.