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Finding the Fourth Proportional to 135.02, 186.39 and 88.39

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Solution

The fourth proportional to 135.02, 186.39 and 88.39 is: 122.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.02 : 186.39 = 88.39 : x
  2. Step 2: Convert to fraction form
    135.02/186.39 = 88.39/x
  3. Step 3: Cross multiply
    135.02x = 186.39 × 88.39
  4. Step 4: Simplify right side
    135.02x = 16,475.03
  5. Step 5: Solve for x
    x = 16,475.03/135.02
  6. Step 6: Final answer
    x = 122.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.