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Finding the Fourth Proportional to 104,685.44, 156,968.70 and 71,445.78

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Solution

The fourth proportional to 104,685.44, 156,968.70 and 71,445.78 is: 107,128.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,685.44 : 156,968.70 = 71,445.78 : x
  2. Step 2: Convert to fraction form
    104,685.44/156,968.70 = 71,445.78/x
  3. Step 3: Cross multiply
    104,685.44x = 156,968.70 × 71,445.78
  4. Step 4: Simplify right side
    104,685.44x = 11,214,751,207.09
  5. Step 5: Solve for x
    x = 11,214,751,207.09/104,685.44
  6. Step 6: Final answer
    x = 107,128.09

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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.