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Finding the Fourth Proportional to 119,685.75, 165,165.39 and 65,969.79

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Solution

The fourth proportional to 119,685.75, 165,165.39 and 65,969.79 is: 91,037.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,685.75 : 165,165.39 = 65,969.79 : x
  2. Step 2: Convert to fraction form
    119,685.75/165,165.39 = 65,969.79/x
  3. Step 3: Cross multiply
    119,685.75x = 165,165.39 × 65,969.79
  4. Step 4: Simplify right side
    119,685.75x = 10,895,926,093.57
  5. Step 5: Solve for x
    x = 10,895,926,093.57/119,685.75
  6. Step 6: Final answer
    x = 91,037.79

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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.