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Finding the Fourth Proportional to 104,070.40, 156,249.60 and 66,860.80

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Solution

The fourth proportional to 104,070.40, 156,249.60 and 66,860.80 is: 100,383.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,070.40 : 156,249.60 = 66,860.80 : x
  2. Step 2: Convert to fraction form
    104,070.40/156,249.60 = 66,860.80/x
  3. Step 3: Cross multiply
    104,070.40x = 156,249.60 × 66,860.80
  4. Step 4: Simplify right side
    104,070.40x = 10,446,973,255.68
  5. Step 5: Solve for x
    x = 10,446,973,255.68/104,070.40
  6. Step 6: Final answer
    x = 100,383.71

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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.