Home / 79,850.33-119,121.11-77,678.25

Finding the Fourth Proportional to 79,850.33, 119,121.11 and 77,678.25

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Solution

The fourth proportional to 79,850.33, 119,121.11 and 77,678.25 is: 115,880.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,850.33 : 119,121.11 = 77,678.25 : x
  2. Step 2: Convert to fraction form
    79,850.33/119,121.11 = 77,678.25/x
  3. Step 3: Cross multiply
    79,850.33x = 119,121.11 × 77,678.25
  4. Step 4: Simplify right side
    79,850.33x = 9,253,118,974.47
  5. Step 5: Solve for x
    x = 9,253,118,974.47/79,850.33
  6. Step 6: Final answer
    x = 115,880.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.