Home / 209,972.20-314,958.30-125,991.40

Finding the Fourth Proportional to 209,972.20, 314,958.30 and 125,991.40

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Solution

The fourth proportional to 209,972.20, 314,958.30 and 125,991.40 is: 188,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,972.20 : 314,958.30 = 125,991.40 : x
  2. Step 2: Convert to fraction form
    209,972.20/314,958.30 = 125,991.40/x
  3. Step 3: Cross multiply
    209,972.20x = 314,958.30 × 125,991.40
  4. Step 4: Simplify right side
    209,972.20x = 39,682,037,158.62
  5. Step 5: Solve for x
    x = 39,682,037,158.62/209,972.20
  6. Step 6: Final answer
    x = 188,987.10

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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.