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Finding the Fourth Proportional to 84.60, 127.08 and 75.06

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Solution

The fourth proportional to 84.60, 127.08 and 75.06 is: 112.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.60 : 127.08 = 75.06 : x
  2. Step 2: Convert to fraction form
    84.60/127.08 = 75.06/x
  3. Step 3: Cross multiply
    84.60x = 127.08 × 75.06
  4. Step 4: Simplify right side
    84.60x = 9,538.62
  5. Step 5: Solve for x
    x = 9,538.62/84.60
  6. Step 6: Final answer
    x = 112.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.