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Finding the Fourth Proportional to 170,791.68, 256,343.78 and 86,609.94

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Solution

The fourth proportional to 170,791.68, 256,343.78 and 86,609.94 is: 129,994.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,791.68 : 256,343.78 = 86,609.94 : x
  2. Step 2: Convert to fraction form
    170,791.68/256,343.78 = 86,609.94/x
  3. Step 3: Cross multiply
    170,791.68x = 256,343.78 × 86,609.94
  4. Step 4: Simplify right side
    170,791.68x = 22,201,918,972.12
  5. Step 5: Solve for x
    x = 22,201,918,972.12/170,791.68
  6. Step 6: Final answer
    x = 129,994.15

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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.