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Finding the Fourth Proportional to 157.64, 235.98 and 121.64

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Solution

The fourth proportional to 157.64, 235.98 and 121.64 is: 182.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.64 : 235.98 = 121.64 : x
  2. Step 2: Convert to fraction form
    157.64/235.98 = 121.64/x
  3. Step 3: Cross multiply
    157.64x = 235.98 × 121.64
  4. Step 4: Simplify right side
    157.64x = 28,704.61
  5. Step 5: Solve for x
    x = 28,704.61/157.64
  6. Step 6: Final answer
    x = 182.09

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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.