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Finding the Fourth Proportional to 186,180.78, 279,338.85 and 91,401

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Solution

The fourth proportional to 186,180.78, 279,338.85 and 91,401 is: 137,134.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,180.78 : 279,338.85 = 91,401 : x
  2. Step 2: Convert to fraction form
    186,180.78/279,338.85 = 91,401/x
  3. Step 3: Cross multiply
    186,180.78x = 279,338.85 × 91,401
  4. Step 4: Simplify right side
    186,180.78x = 25,531,850,228.85
  5. Step 5: Solve for x
    x = 25,531,850,228.85/186,180.78
  6. Step 6: Final answer
    x = 137,134.73

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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.