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Finding the Fourth Proportional to 119,638.88, 165,107.04 and 71,914.40

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Solution

The fourth proportional to 119,638.88, 165,107.04 and 71,914.40 is: 99,245.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,638.88 : 165,107.04 = 71,914.40 : x
  2. Step 2: Convert to fraction form
    119,638.88/165,107.04 = 71,914.40/x
  3. Step 3: Cross multiply
    119,638.88x = 165,107.04 × 71,914.40
  4. Step 4: Simplify right side
    119,638.88x = 11,873,573,717.38
  5. Step 5: Solve for x
    x = 11,873,573,717.38/119,638.88
  6. Step 6: Final answer
    x = 99,245.11

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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.