Home / 81,121.86-111,947.94-45,311.94

Finding the Fourth Proportional to 81,121.86, 111,947.94 and 45,311.94

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Solution

The fourth proportional to 81,121.86, 111,947.94 and 45,311.94 is: 62,530.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,121.86 : 111,947.94 = 45,311.94 : x
  2. Step 2: Convert to fraction form
    81,121.86/111,947.94 = 45,311.94/x
  3. Step 3: Cross multiply
    81,121.86x = 111,947.94 × 45,311.94
  4. Step 4: Simplify right side
    81,121.86x = 5,072,578,340.40
  5. Step 5: Solve for x
    x = 5,072,578,340.40/81,121.86
  6. Step 6: Final answer
    x = 62,530.35

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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.