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Finding the Fourth Proportional to 110,742.80, 166,114.20 and 66,346.70

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Solution

The fourth proportional to 110,742.80, 166,114.20 and 66,346.70 is: 99,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,742.80 : 166,114.20 = 66,346.70 : x
  2. Step 2: Convert to fraction form
    110,742.80/166,114.20 = 66,346.70/x
  3. Step 3: Cross multiply
    110,742.80x = 166,114.20 × 66,346.70
  4. Step 4: Simplify right side
    110,742.80x = 11,021,128,993.14
  5. Step 5: Solve for x
    x = 11,021,128,993.14/110,742.80
  6. Step 6: Final answer
    x = 99,520.05

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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.