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Finding the Fourth Proportional to 110,728.70, 166,093.05 and 81,204.20

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Solution

The fourth proportional to 110,728.70, 166,093.05 and 81,204.20 is: 121,806.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,728.70 : 166,093.05 = 81,204.20 : x
  2. Step 2: Convert to fraction form
    110,728.70/166,093.05 = 81,204.20/x
  3. Step 3: Cross multiply
    110,728.70x = 166,093.05 × 81,204.20
  4. Step 4: Simplify right side
    110,728.70x = 13,487,453,250.81
  5. Step 5: Solve for x
    x = 13,487,453,250.81/110,728.70
  6. Step 6: Final answer
    x = 121,806.30

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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.