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Finding the Fourth Proportional to 157.15, 235.33 and 116.65

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Solution

The fourth proportional to 157.15, 235.33 and 116.65 is: 174.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.15 : 235.33 = 116.65 : x
  2. Step 2: Convert to fraction form
    157.15/235.33 = 116.65/x
  3. Step 3: Cross multiply
    157.15x = 235.33 × 116.65
  4. Step 4: Simplify right side
    157.15x = 27,451.24
  5. Step 5: Solve for x
    x = 27,451.24/157.15
  6. Step 6: Final answer
    x = 174.68

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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.