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Finding the Fourth Proportional to 130,960.80, 196,441.20 and 129,211.20

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Solution

The fourth proportional to 130,960.80, 196,441.20 and 129,211.20 is: 193,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,960.80 : 196,441.20 = 129,211.20 : x
  2. Step 2: Convert to fraction form
    130,960.80/196,441.20 = 129,211.20/x
  3. Step 3: Cross multiply
    130,960.80x = 196,441.20 × 129,211.20
  4. Step 4: Simplify right side
    130,960.80x = 25,382,403,181.44
  5. Step 5: Solve for x
    x = 25,382,403,181.44/130,960.80
  6. Step 6: Final answer
    x = 193,816.80

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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.