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Finding the Fourth Proportional to 157.41, 216.81 and 135.54

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Solution

The fourth proportional to 157.41, 216.81 and 135.54 is: 186.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.41 : 216.81 = 135.54 : x
  2. Step 2: Convert to fraction form
    157.41/216.81 = 135.54/x
  3. Step 3: Cross multiply
    157.41x = 216.81 × 135.54
  4. Step 4: Simplify right side
    157.41x = 29,386.43
  5. Step 5: Solve for x
    x = 29,386.43/157.41
  6. Step 6: Final answer
    x = 186.69

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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.