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Finding the Fourth Proportional to 119,910.74, 165,476.84 and 66,195.78

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Solution

The fourth proportional to 119,910.74, 165,476.84 and 66,195.78 is: 91,350.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,910.74 : 165,476.84 = 66,195.78 : x
  2. Step 2: Convert to fraction form
    119,910.74/165,476.84 = 66,195.78/x
  3. Step 3: Cross multiply
    119,910.74x = 165,476.84 × 66,195.78
  4. Step 4: Simplify right side
    119,910.74x = 10,953,868,164.76
  5. Step 5: Solve for x
    x = 10,953,868,164.76/119,910.74
  6. Step 6: Final answer
    x = 91,350.19

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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.