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Finding the Fourth Proportional to 157.47, 236.07 and 121.29

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Solution

The fourth proportional to 157.47, 236.07 and 121.29 is: 181.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.47 : 236.07 = 121.29 : x
  2. Step 2: Convert to fraction form
    157.47/236.07 = 121.29/x
  3. Step 3: Cross multiply
    157.47x = 236.07 × 121.29
  4. Step 4: Simplify right side
    157.47x = 28,632.93
  5. Step 5: Solve for x
    x = 28,632.93/157.47
  6. Step 6: Final answer
    x = 181.83

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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.