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Finding the Fourth Proportional to 119,978.66, 165,571.89 and 66,262.43

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Solution

The fourth proportional to 119,978.66, 165,571.89 and 66,262.43 is: 91,442.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,978.66 : 165,571.89 = 66,262.43 : x
  2. Step 2: Convert to fraction form
    119,978.66/165,571.89 = 66,262.43/x
  3. Step 3: Cross multiply
    119,978.66x = 165,571.89 × 66,262.43
  4. Step 4: Simplify right side
    119,978.66x = 10,971,195,771.09
  5. Step 5: Solve for x
    x = 10,971,195,771.09/119,978.66
  6. Step 6: Final answer
    x = 91,442.89

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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.