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Finding the Fourth Proportional to 157.55, 217.40 and 92.03

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Solution

The fourth proportional to 157.55, 217.40 and 92.03 is: 126.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.55 : 217.40 = 92.03 : x
  2. Step 2: Convert to fraction form
    157.55/217.40 = 92.03/x
  3. Step 3: Cross multiply
    157.55x = 217.40 × 92.03
  4. Step 4: Simplify right side
    157.55x = 20,005.77
  5. Step 5: Solve for x
    x = 20,005.77/157.55
  6. Step 6: Final answer
    x = 126.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.