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Finding the Fourth Proportional to 157.01, 216.69 and 91.54

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Solution

The fourth proportional to 157.01, 216.69 and 91.54 is: 126.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.01 : 216.69 = 91.54 : x
  2. Step 2: Convert to fraction form
    157.01/216.69 = 91.54/x
  3. Step 3: Cross multiply
    157.01x = 216.69 × 91.54
  4. Step 4: Simplify right side
    157.01x = 19,835.80
  5. Step 5: Solve for x
    x = 19,835.80/157.01
  6. Step 6: Final answer
    x = 126.33

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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.