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Finding the Fourth Proportional to 119,911.31, 165,482.96 and 68,940.57

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Solution

The fourth proportional to 119,911.31, 165,482.96 and 68,940.57 is: 95,141.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,911.31 : 165,482.96 = 68,940.57 : x
  2. Step 2: Convert to fraction form
    119,911.31/165,482.96 = 68,940.57/x
  3. Step 3: Cross multiply
    119,911.31x = 165,482.96 × 68,940.57
  4. Step 4: Simplify right side
    119,911.31x = 11,408,489,587.69
  5. Step 5: Solve for x
    x = 11,408,489,587.69/119,911.31
  6. Step 6: Final answer
    x = 95,141.06

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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.