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Finding the Fourth Proportional to 119,991.96, 165,654.72 and 72,257.04

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Solution

The fourth proportional to 119,991.96, 165,654.72 and 72,257.04 is: 99,754.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,991.96 : 165,654.72 = 72,257.04 : x
  2. Step 2: Convert to fraction form
    119,991.96/165,654.72 = 72,257.04/x
  3. Step 3: Cross multiply
    119,991.96x = 165,654.72 × 72,257.04
  4. Step 4: Simplify right side
    119,991.96x = 11,969,719,729.23
  5. Step 5: Solve for x
    x = 11,969,719,729.23/119,991.96
  6. Step 6: Final answer
    x = 99,754.35

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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.