Home / 149,979.20-206,971.40-81,995.09

Finding the Fourth Proportional to 149,979.20, 206,971.40 and 81,995.09

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Solution

The fourth proportional to 149,979.20, 206,971.40 and 81,995.09 is: 113,153.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,979.20 : 206,971.40 = 81,995.09 : x
  2. Step 2: Convert to fraction form
    149,979.20/206,971.40 = 81,995.09/x
  3. Step 3: Cross multiply
    149,979.20x = 206,971.40 × 81,995.09
  4. Step 4: Simplify right side
    149,979.20x = 16,970,637,740.56
  5. Step 5: Solve for x
    x = 16,970,637,740.56/149,979.20
  6. Step 6: Final answer
    x = 113,153.28

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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.