Home / 81,118.26-111,942.20-45,309.78

Finding the Fourth Proportional to 81,118.26, 111,942.20 and 45,309.78

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Solution

The fourth proportional to 81,118.26, 111,942.20 and 45,309.78 is: 62,526.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,118.26 : 111,942.20 = 45,309.78 : x
  2. Step 2: Convert to fraction form
    81,118.26/111,942.20 = 45,309.78/x
  3. Step 3: Cross multiply
    81,118.26x = 111,942.20 × 45,309.78
  4. Step 4: Simplify right side
    81,118.26x = 5,072,076,567.99
  5. Step 5: Solve for x
    x = 5,072,076,567.99/81,118.26
  6. Step 6: Final answer
    x = 62,526.94

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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.