Home / 131,119.20-196,678.80-68,781.60

Finding the Fourth Proportional to 131,119.20, 196,678.80 and 68,781.60

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Solution

The fourth proportional to 131,119.20, 196,678.80 and 68,781.60 is: 103,172.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,119.20 : 196,678.80 = 68,781.60 : x
  2. Step 2: Convert to fraction form
    131,119.20/196,678.80 = 68,781.60/x
  3. Step 3: Cross multiply
    131,119.20x = 196,678.80 × 68,781.60
  4. Step 4: Simplify right side
    131,119.20x = 13,527,882,550.08
  5. Step 5: Solve for x
    x = 13,527,882,550.08/131,119.20
  6. Step 6: Final answer
    x = 103,172.40

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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.