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Finding the Fourth Proportional to 119,886.52, 165,443.88 and 66,172

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Solution

The fourth proportional to 119,886.52, 165,443.88 and 66,172 is: 91,317.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,886.52 : 165,443.88 = 66,172 : x
  2. Step 2: Convert to fraction form
    119,886.52/165,443.88 = 66,172/x
  3. Step 3: Cross multiply
    119,886.52x = 165,443.88 × 66,172
  4. Step 4: Simplify right side
    119,886.52x = 10,947,752,427.36
  5. Step 5: Solve for x
    x = 10,947,752,427.36/119,886.52
  6. Step 6: Final answer
    x = 91,317.63

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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.