Home / 120,197.12-165,906.52-79,391.10

Finding the Fourth Proportional to 120,197.12, 165,906.52 and 79,391.10

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Solution

The fourth proportional to 120,197.12, 165,906.52 and 79,391.10 is: 109,582.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,197.12 : 165,906.52 = 79,391.10 : x
  2. Step 2: Convert to fraction form
    120,197.12/165,906.52 = 79,391.10/x
  3. Step 3: Cross multiply
    120,197.12x = 165,906.52 × 79,391.10
  4. Step 4: Simplify right side
    120,197.12x = 13,171,501,119.97
  5. Step 5: Solve for x
    x = 13,171,501,119.97/120,197.12
  6. Step 6: Final answer
    x = 109,582.50

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1.5x scale

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.