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Finding the Fourth Proportional to 157.23, 235.80 and 80.24

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Solution

The fourth proportional to 157.23, 235.80 and 80.24 is: 120.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.23 : 235.80 = 80.24 : x
  2. Step 2: Convert to fraction form
    157.23/235.80 = 80.24/x
  3. Step 3: Cross multiply
    157.23x = 235.80 × 80.24
  4. Step 4: Simplify right side
    157.23x = 18,919.41
  5. Step 5: Solve for x
    x = 18,919.41/157.23
  6. Step 6: Final answer
    x = 120.33

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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.