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Finding the Fourth Proportional to 120,194.62, 165,903.06 and 79,388.58

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Solution

The fourth proportional to 120,194.62, 165,903.06 and 79,388.58 is: 109,579.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,194.62 : 165,903.06 = 79,388.58 : x
  2. Step 2: Convert to fraction form
    120,194.62/165,903.06 = 79,388.58/x
  3. Step 3: Cross multiply
    120,194.62x = 165,903.06 × 79,388.58
  4. Step 4: Simplify right side
    120,194.62x = 13,170,808,351.05
  5. Step 5: Solve for x
    x = 13,170,808,351.05/120,194.62
  6. Step 6: Final answer
    x = 109,579.02

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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.