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Finding the Fourth Proportional to 103.19, 154.45 and 64.54

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Solution

The fourth proportional to 103.19, 154.45 and 64.54 is: 96.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.19 : 154.45 = 64.54 : x
  2. Step 2: Convert to fraction form
    103.19/154.45 = 64.54/x
  3. Step 3: Cross multiply
    103.19x = 154.45 × 64.54
  4. Step 4: Simplify right side
    103.19x = 9,967.88
  5. Step 5: Solve for x
    x = 9,967.88/103.19
  6. Step 6: Final answer
    x = 96.60

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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.