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Finding the Fourth Proportional to 158.55, 237.65 and 67.17

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Solution

The fourth proportional to 158.55, 237.65 and 67.17 is: 100.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.55 : 237.65 = 67.17 : x
  2. Step 2: Convert to fraction form
    158.55/237.65 = 67.17/x
  3. Step 3: Cross multiply
    158.55x = 237.65 × 67.17
  4. Step 4: Simplify right side
    158.55x = 15,962.61
  5. Step 5: Solve for x
    x = 15,962.61/158.55
  6. Step 6: Final answer
    x = 100.68

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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.