Home / 81,976.05-113,140.80-50,155.20

Finding the Fourth Proportional to 81,976.05, 113,140.80 and 50,155.20

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Solution

The fourth proportional to 81,976.05, 113,140.80 and 50,155.20 is: 69,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,976.05 : 113,140.80 = 50,155.20 : x
  2. Step 2: Convert to fraction form
    81,976.05/113,140.80 = 50,155.20/x
  3. Step 3: Cross multiply
    81,976.05x = 113,140.80 × 50,155.20
  4. Step 4: Simplify right side
    81,976.05x = 5,674,599,452.16
  5. Step 5: Solve for x
    x = 5,674,599,452.16/81,976.05
  6. Step 6: Final answer
    x = 69,222.65

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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.