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Finding the Fourth Proportional to 89,843.40, 134,505.90 and 80,512.20

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Solution

The fourth proportional to 89,843.40, 134,505.90 and 80,512.20 is: 120,536.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,843.40 : 134,505.90 = 80,512.20 : x
  2. Step 2: Convert to fraction form
    89,843.40/134,505.90 = 80,512.20/x
  3. Step 3: Cross multiply
    89,843.40x = 134,505.90 × 80,512.20
  4. Step 4: Simplify right side
    89,843.40x = 10,829,365,921.98
  5. Step 5: Solve for x
    x = 10,829,365,921.98/89,843.40
  6. Step 6: Final answer
    x = 120,536.02

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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.