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Finding the Fourth Proportional to 119,917.80, 165,484.41 and 66,201.68

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Solution

The fourth proportional to 119,917.80, 165,484.41 and 66,201.68 is: 91,357.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,917.80 : 165,484.41 = 66,201.68 : x
  2. Step 2: Convert to fraction form
    119,917.80/165,484.41 = 66,201.68/x
  3. Step 3: Cross multiply
    119,917.80x = 165,484.41 × 66,201.68
  4. Step 4: Simplify right side
    119,917.80x = 10,955,345,128.39
  5. Step 5: Solve for x
    x = 10,955,345,128.39/119,917.80
  6. Step 6: Final answer
    x = 91,357.12

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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.