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Finding the Fourth Proportional to 157.19, 236.72 and 137.15

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Solution

The fourth proportional to 157.19, 236.72 and 137.15 is: 206.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.19 : 236.72 = 137.15 : x
  2. Step 2: Convert to fraction form
    157.19/236.72 = 137.15/x
  3. Step 3: Cross multiply
    157.19x = 236.72 × 137.15
  4. Step 4: Simplify right side
    157.19x = 32,464.28
  5. Step 5: Solve for x
    x = 32,464.28/157.19
  6. Step 6: Final answer
    x = 206.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.