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Finding the Fourth Proportional to 157.25, 234.62 and 139.83

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Solution

The fourth proportional to 157.25, 234.62 and 139.83 is: 208.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.25 : 234.62 = 139.83 : x
  2. Step 2: Convert to fraction form
    157.25/234.62 = 139.83/x
  3. Step 3: Cross multiply
    157.25x = 234.62 × 139.83
  4. Step 4: Simplify right side
    157.25x = 32,806.22
  5. Step 5: Solve for x
    x = 32,806.22/157.25
  6. Step 6: Final answer
    x = 208.63

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.