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Finding the Fourth Proportional to 157.74, 236.62 and 55.01

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Solution

The fourth proportional to 157.74, 236.62 and 55.01 is: 82.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.74 : 236.62 = 55.01 : x
  2. Step 2: Convert to fraction form
    157.74/236.62 = 55.01/x
  3. Step 3: Cross multiply
    157.74x = 236.62 × 55.01
  4. Step 4: Simplify right side
    157.74x = 13,015.28
  5. Step 5: Solve for x
    x = 13,015.28/157.74
  6. Step 6: Final answer
    x = 82.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.