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Finding the Fourth Proportional to 126,734.40, 190,101.60 and 80,193.60

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Solution

The fourth proportional to 126,734.40, 190,101.60 and 80,193.60 is: 120,290.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,734.40 : 190,101.60 = 80,193.60 : x
  2. Step 2: Convert to fraction form
    126,734.40/190,101.60 = 80,193.60/x
  3. Step 3: Cross multiply
    126,734.40x = 190,101.60 × 80,193.60
  4. Step 4: Simplify right side
    126,734.40x = 15,244,931,669.76
  5. Step 5: Solve for x
    x = 15,244,931,669.76/126,734.40
  6. Step 6: Final answer
    x = 120,290.40

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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.