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Finding the Fourth Proportional to 158.56, 236.84 and 140.64

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Solution

The fourth proportional to 158.56, 236.84 and 140.64 is: 210.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.56 : 236.84 = 140.64 : x
  2. Step 2: Convert to fraction form
    158.56/236.84 = 140.64/x
  3. Step 3: Cross multiply
    158.56x = 236.84 × 140.64
  4. Step 4: Simplify right side
    158.56x = 33,309.18
  5. Step 5: Solve for x
    x = 33,309.18/158.56
  6. Step 6: Final answer
    x = 210.07

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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.