Home / 154,913.11-213,791.20-86,936.69

Finding the Fourth Proportional to 154,913.11, 213,791.20 and 86,936.69

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Solution

The fourth proportional to 154,913.11, 213,791.20 and 86,936.69 is: 119,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,913.11 : 213,791.20 = 86,936.69 : x
  2. Step 2: Convert to fraction form
    154,913.11/213,791.20 = 86,936.69/x
  3. Step 3: Cross multiply
    154,913.11x = 213,791.20 × 86,936.69
  4. Step 4: Simplify right side
    154,913.11x = 18,586,299,596.26
  5. Step 5: Solve for x
    x = 18,586,299,596.26/154,913.11
  6. Step 6: Final answer
    x = 119,978.87

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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.