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Finding the Fourth Proportional to 163.34, 225.40 and 93.40

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Solution

The fourth proportional to 163.34, 225.40 and 93.40 is: 128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.34 : 225.40 = 93.40 : x
  2. Step 2: Convert to fraction form
    163.34/225.40 = 93.40/x
  3. Step 3: Cross multiply
    163.34x = 225.40 × 93.40
  4. Step 4: Simplify right side
    163.34x = 21,052.36
  5. Step 5: Solve for x
    x = 21,052.36/163.34
  6. Step 6: Final answer
    x = 128.89

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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.