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Finding the Fourth Proportional to 110,709.12, 165,921.12 and 40,504.80

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Solution

The fourth proportional to 110,709.12, 165,921.12 and 40,504.80 is: 60,705.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,709.12 : 165,921.12 = 40,504.80 : x
  2. Step 2: Convert to fraction form
    110,709.12/165,921.12 = 40,504.80/x
  3. Step 3: Cross multiply
    110,709.12x = 165,921.12 × 40,504.80
  4. Step 4: Simplify right side
    110,709.12x = 6,720,601,781.38
  5. Step 5: Solve for x
    x = 6,720,601,781.38/110,709.12
  6. Step 6: Final answer
    x = 60,705.04

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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.