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Finding the Fourth Proportional to 130,120.40, 195,180.60 and 80,256.80

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Solution

The fourth proportional to 130,120.40, 195,180.60 and 80,256.80 is: 120,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,120.40 : 195,180.60 = 80,256.80 : x
  2. Step 2: Convert to fraction form
    130,120.40/195,180.60 = 80,256.80/x
  3. Step 3: Cross multiply
    130,120.40x = 195,180.60 × 80,256.80
  4. Step 4: Simplify right side
    130,120.40x = 15,664,570,378.08
  5. Step 5: Solve for x
    x = 15,664,570,378.08/130,120.40
  6. Step 6: Final answer
    x = 120,385.20

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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.