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Finding the Fourth Proportional to 135,234.39, 202,672.40 and 71,918.18

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Solution

The fourth proportional to 135,234.39, 202,672.40 and 71,918.18 is: 107,781.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,234.39 : 202,672.40 = 71,918.18 : x
  2. Step 2: Convert to fraction form
    135,234.39/202,672.40 = 71,918.18/x
  3. Step 3: Cross multiply
    135,234.39x = 202,672.40 × 71,918.18
  4. Step 4: Simplify right side
    135,234.39x = 14,575,828,771.28
  5. Step 5: Solve for x
    x = 14,575,828,771.28/135,234.39
  6. Step 6: Final answer
    x = 107,781.97

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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.