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Finding the Fourth Proportional to 158.61, 236.69 and 140.39

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Solution

The fourth proportional to 158.61, 236.69 and 140.39 is: 209.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.61 : 236.69 = 140.39 : x
  2. Step 2: Convert to fraction form
    158.61/236.69 = 140.39/x
  3. Step 3: Cross multiply
    158.61x = 236.69 × 140.39
  4. Step 4: Simplify right side
    158.61x = 33,227.02
  5. Step 5: Solve for x
    x = 33,227.02/158.61
  6. Step 6: Final answer
    x = 209.49

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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.