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Finding the Fourth Proportional to 157.16, 217.10 and 126.03

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Solution

The fourth proportional to 157.16, 217.10 and 126.03 is: 174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.16 : 217.10 = 126.03 : x
  2. Step 2: Convert to fraction form
    157.16/217.10 = 126.03/x
  3. Step 3: Cross multiply
    157.16x = 217.10 × 126.03
  4. Step 4: Simplify right side
    157.16x = 27,360.48
  5. Step 5: Solve for x
    x = 27,360.48/157.16
  6. Step 6: Final answer
    x = 174.10

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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.