Home / 81,109.80-121,578.66-47,845.56

Finding the Fourth Proportional to 81,109.80, 121,578.66 and 47,845.56

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Solution

The fourth proportional to 81,109.80, 121,578.66 and 47,845.56 is: 71,717.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,109.80 : 121,578.66 = 47,845.56 : x
  2. Step 2: Convert to fraction form
    81,109.80/121,578.66 = 47,845.56/x
  3. Step 3: Cross multiply
    81,109.80x = 121,578.66 × 47,845.56
  4. Step 4: Simplify right side
    81,109.80x = 5,816,999,071.75
  5. Step 5: Solve for x
    x = 5,816,999,071.75/81,109.80
  6. Step 6: Final answer
    x = 71,717.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.