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Finding the Fourth Proportional to 103.17, 154.64 and 48.99

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Solution

The fourth proportional to 103.17, 154.64 and 48.99 is: 73.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.17 : 154.64 = 48.99 : x
  2. Step 2: Convert to fraction form
    103.17/154.64 = 48.99/x
  3. Step 3: Cross multiply
    103.17x = 154.64 × 48.99
  4. Step 4: Simplify right side
    103.17x = 7,575.94
  5. Step 5: Solve for x
    x = 7,575.94/103.17
  6. Step 6: Final answer
    x = 73.43

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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.