Home / 259,492.25-389,236.05-81,999.29

Finding the Fourth Proportional to 259,492.25, 389,236.05 and 81,999.29

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Solution

The fourth proportional to 259,492.25, 389,236.05 and 81,999.29 is: 122,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,492.25 : 389,236.05 = 81,999.29 : x
  2. Step 2: Convert to fraction form
    259,492.25/389,236.05 = 81,999.29/x
  3. Step 3: Cross multiply
    259,492.25x = 389,236.05 × 81,999.29
  4. Step 4: Simplify right side
    259,492.25x = 31,917,080,715.49
  5. Step 5: Solve for x
    x = 31,917,080,715.49/259,492.25
  6. Step 6: Final answer
    x = 122,998.20

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1.5x scale

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.