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Finding the Fourth Proportional to 158.41, 237.45 and 77.20

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Solution

The fourth proportional to 158.41, 237.45 and 77.20 is: 115.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.41 : 237.45 = 77.20 : x
  2. Step 2: Convert to fraction form
    158.41/237.45 = 77.20/x
  3. Step 3: Cross multiply
    158.41x = 237.45 × 77.20
  4. Step 4: Simplify right side
    158.41x = 18,331.14
  5. Step 5: Solve for x
    x = 18,331.14/158.41
  6. Step 6: Final answer
    x = 115.72

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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.