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Finding the Fourth Proportional to 157.44, 235.00 and 139.22

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Solution

The fourth proportional to 157.44, 235.00 and 139.22 is: 207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.44 : 235.00 = 139.22 : x
  2. Step 2: Convert to fraction form
    157.44/235.00 = 139.22/x
  3. Step 3: Cross multiply
    157.44x = 235.00 × 139.22
  4. Step 4: Simplify right side
    157.44x = 32,716.58
  5. Step 5: Solve for x
    x = 32,716.58/157.44
  6. Step 6: Final answer
    x = 207.80

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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.