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Finding the Fourth Proportional to 158.46, 236.62 and 129.63

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Solution

The fourth proportional to 158.46, 236.62 and 129.63 is: 193.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.46 : 236.62 = 129.63 : x
  2. Step 2: Convert to fraction form
    158.46/236.62 = 129.63/x
  3. Step 3: Cross multiply
    158.46x = 236.62 × 129.63
  4. Step 4: Simplify right side
    158.46x = 30,673.05
  5. Step 5: Solve for x
    x = 30,673.05/158.46
  6. Step 6: Final answer
    x = 193.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.