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Finding the Fourth Proportional to 158.33, 237.72 and 81.35

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Solution

The fourth proportional to 158.33, 237.72 and 81.35 is: 122.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.33 : 237.72 = 81.35 : x
  2. Step 2: Convert to fraction form
    158.33/237.72 = 81.35/x
  3. Step 3: Cross multiply
    158.33x = 237.72 × 81.35
  4. Step 4: Simplify right side
    158.33x = 19,336.93
  5. Step 5: Solve for x
    x = 19,336.93/158.33
  6. Step 6: Final answer
    x = 122.13

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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.