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Finding the Fourth Proportional to 73.63, 109.90 and 63.30

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Solution

The fourth proportional to 73.63, 109.90 and 63.30 is: 94.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.63 : 109.90 = 63.30 : x
  2. Step 2: Convert to fraction form
    73.63/109.90 = 63.30/x
  3. Step 3: Cross multiply
    73.63x = 109.90 × 63.30
  4. Step 4: Simplify right side
    73.63x = 6,956.67
  5. Step 5: Solve for x
    x = 6,956.67/73.63
  6. Step 6: Final answer
    x = 94.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.