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Finding the Fourth Proportional to 158.55, 236.80 and 140.32

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Solution

The fourth proportional to 158.55, 236.80 and 140.32 is: 209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.55 : 236.80 = 140.32 : x
  2. Step 2: Convert to fraction form
    158.55/236.80 = 140.32/x
  3. Step 3: Cross multiply
    158.55x = 236.80 × 140.32
  4. Step 4: Simplify right side
    158.55x = 33,227.78
  5. Step 5: Solve for x
    x = 33,227.78/158.55
  6. Step 6: Final answer
    x = 209.57

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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.