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Finding the Fourth Proportional to 158.35, 237.31 and 66.94

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Solution

The fourth proportional to 158.35, 237.31 and 66.94 is: 100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.35 : 237.31 = 66.94 : x
  2. Step 2: Convert to fraction form
    158.35/237.31 = 66.94/x
  3. Step 3: Cross multiply
    158.35x = 237.31 × 66.94
  4. Step 4: Simplify right side
    158.35x = 15,885.53
  5. Step 5: Solve for x
    x = 15,885.53/158.35
  6. Step 6: Final answer
    x = 100.32

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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.