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Finding the Fourth Proportional to 157.45, 217.26 and 88.45

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Solution

The fourth proportional to 157.45, 217.26 and 88.45 is: 122.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.45 : 217.26 = 88.45 : x
  2. Step 2: Convert to fraction form
    157.45/217.26 = 88.45/x
  3. Step 3: Cross multiply
    157.45x = 217.26 × 88.45
  4. Step 4: Simplify right side
    157.45x = 19,216.65
  5. Step 5: Solve for x
    x = 19,216.65/157.45
  6. Step 6: Final answer
    x = 122.05

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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.