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Finding the Fourth Proportional to 157.17, 235.45 and 120.92

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Solution

The fourth proportional to 157.17, 235.45 and 120.92 is: 181.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.17 : 235.45 = 120.92 : x
  2. Step 2: Convert to fraction form
    157.17/235.45 = 120.92/x
  3. Step 3: Cross multiply
    157.17x = 235.45 × 120.92
  4. Step 4: Simplify right side
    157.17x = 28,470.01
  5. Step 5: Solve for x
    x = 28,470.01/157.17
  6. Step 6: Final answer
    x = 181.14

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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.