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Finding the Fourth Proportional to 157.29, 216.93 and 104.82

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Solution

The fourth proportional to 157.29, 216.93 and 104.82 is: 144.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.29 : 216.93 = 104.82 : x
  2. Step 2: Convert to fraction form
    157.29/216.93 = 104.82/x
  3. Step 3: Cross multiply
    157.29x = 216.93 × 104.82
  4. Step 4: Simplify right side
    157.29x = 22,738.60
  5. Step 5: Solve for x
    x = 22,738.60/157.29
  6. Step 6: Final answer
    x = 144.56

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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.