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Finding the Fourth Proportional to 126,960.40, 190,440.60 and 80,419.60

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Solution

The fourth proportional to 126,960.40, 190,440.60 and 80,419.60 is: 120,629.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,960.40 : 190,440.60 = 80,419.60 : x
  2. Step 2: Convert to fraction form
    126,960.40/190,440.60 = 80,419.60/x
  3. Step 3: Cross multiply
    126,960.40x = 190,440.60 × 80,419.60
  4. Step 4: Simplify right side
    126,960.40x = 15,315,156,875.76
  5. Step 5: Solve for x
    x = 15,315,156,875.76/126,960.40
  6. Step 6: Final answer
    x = 120,629.40

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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.