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Finding the Fourth Proportional to 186,668.88, 279,945 and 81,459.60

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Solution

The fourth proportional to 186,668.88, 279,945 and 81,459.60 is: 122,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,668.88 : 279,945 = 81,459.60 : x
  2. Step 2: Convert to fraction form
    186,668.88/279,945 = 81,459.60/x
  3. Step 3: Cross multiply
    186,668.88x = 279,945 × 81,459.60
  4. Step 4: Simplify right side
    186,668.88x = 22,804,207,722
  5. Step 5: Solve for x
    x = 22,804,207,722/186,668.88
  6. Step 6: Final answer
    x = 122,163.95

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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.