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Finding the Fourth Proportional to 157.67, 236.54 and 117.57

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Solution

The fourth proportional to 157.67, 236.54 and 117.57 is: 176.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.67 : 236.54 = 117.57 : x
  2. Step 2: Convert to fraction form
    157.67/236.54 = 117.57/x
  3. Step 3: Cross multiply
    157.67x = 236.54 × 117.57
  4. Step 4: Simplify right side
    157.67x = 27,810.01
  5. Step 5: Solve for x
    x = 27,810.01/157.67
  6. Step 6: Final answer
    x = 176.38

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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.