Home / 109,363.20-164,217.60-79,987.20

Finding the Fourth Proportional to 109,363.20, 164,217.60 and 79,987.20

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Solution

The fourth proportional to 109,363.20, 164,217.60 and 79,987.20 is: 120,107.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,363.20 : 164,217.60 = 79,987.20 : x
  2. Step 2: Convert to fraction form
    109,363.20/164,217.60 = 79,987.20/x
  3. Step 3: Cross multiply
    109,363.20x = 164,217.60 × 79,987.20
  4. Step 4: Simplify right side
    109,363.20x = 13,135,306,014.72
  5. Step 5: Solve for x
    x = 13,135,306,014.72/109,363.20
  6. Step 6: Final answer
    x = 120,107.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.