Home / 131,489.20-197,233.80-109,619.20

Finding the Fourth Proportional to 131,489.20, 197,233.80 and 109,619.20

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Solution

The fourth proportional to 131,489.20, 197,233.80 and 109,619.20 is: 164,428.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,489.20 : 197,233.80 = 109,619.20 : x
  2. Step 2: Convert to fraction form
    131,489.20/197,233.80 = 109,619.20/x
  3. Step 3: Cross multiply
    131,489.20x = 197,233.80 × 109,619.20
  4. Step 4: Simplify right side
    131,489.20x = 21,620,611,368.96
  5. Step 5: Solve for x
    x = 21,620,611,368.96/131,489.20
  6. Step 6: Final answer
    x = 164,428.80

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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.