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Finding the Fourth Proportional to 170,791.18, 256,343.02 and 86,609.45

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Solution

The fourth proportional to 170,791.18, 256,343.02 and 86,609.45 is: 129,993.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,791.18 : 256,343.02 = 86,609.45 : x
  2. Step 2: Convert to fraction form
    170,791.18/256,343.02 = 86,609.45/x
  3. Step 3: Cross multiply
    170,791.18x = 256,343.02 × 86,609.45
  4. Step 4: Simplify right side
    170,791.18x = 22,201,727,973.54
  5. Step 5: Solve for x
    x = 22,201,727,973.54/170,791.18
  6. Step 6: Final answer
    x = 129,993.41

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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.