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Finding the Fourth Proportional to 167,615.78, 231,358.80 and 99,680.54

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Solution

The fourth proportional to 167,615.78, 231,358.80 and 99,680.54 is: 137,588.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,615.78 : 231,358.80 = 99,680.54 : x
  2. Step 2: Convert to fraction form
    167,615.78/231,358.80 = 99,680.54/x
  3. Step 3: Cross multiply
    167,615.78x = 231,358.80 × 99,680.54
  4. Step 4: Simplify right side
    167,615.78x = 23,061,970,117.75
  5. Step 5: Solve for x
    x = 23,061,970,117.75/167,615.78
  6. Step 6: Final answer
    x = 137,588.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.