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Finding the Fourth Proportional to 103.27, 154.76 and 87.07

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Solution

The fourth proportional to 103.27, 154.76 and 87.07 is: 130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.27 : 154.76 = 87.07 : x
  2. Step 2: Convert to fraction form
    103.27/154.76 = 87.07/x
  3. Step 3: Cross multiply
    103.27x = 154.76 × 87.07
  4. Step 4: Simplify right side
    103.27x = 13,474.95
  5. Step 5: Solve for x
    x = 13,474.95/103.27
  6. Step 6: Final answer
    x = 130.48

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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.