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Finding the Fourth Proportional to 73.55, 110.21 and 39.30

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Solution

The fourth proportional to 73.55, 110.21 and 39.30 is: 58.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.55 : 110.21 = 39.30 : x
  2. Step 2: Convert to fraction form
    73.55/110.21 = 39.30/x
  3. Step 3: Cross multiply
    73.55x = 110.21 × 39.30
  4. Step 4: Simplify right side
    73.55x = 4,331.53
  5. Step 5: Solve for x
    x = 4,331.53/73.55
  6. Step 6: Final answer
    x = 58.89

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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.