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Finding the Fourth Proportional to 110,680.80, 166,021.20 and 76,855.20

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Solution

The fourth proportional to 110,680.80, 166,021.20 and 76,855.20 is: 115,282.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,680.80 : 166,021.20 = 76,855.20 : x
  2. Step 2: Convert to fraction form
    110,680.80/166,021.20 = 76,855.20/x
  3. Step 3: Cross multiply
    110,680.80x = 166,021.20 × 76,855.20
  4. Step 4: Simplify right side
    110,680.80x = 12,759,592,530.24
  5. Step 5: Solve for x
    x = 12,759,592,530.24/110,680.80
  6. Step 6: Final answer
    x = 115,282.80

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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.