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Finding the Fourth Proportional to 73.17, 109.90 and 55.25

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Solution

The fourth proportional to 73.17, 109.90 and 55.25 is: 82.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.17 : 109.90 = 55.25 : x
  2. Step 2: Convert to fraction form
    73.17/109.90 = 55.25/x
  3. Step 3: Cross multiply
    73.17x = 109.90 × 55.25
  4. Step 4: Simplify right side
    73.17x = 6,071.98
  5. Step 5: Solve for x
    x = 6,071.98/73.17
  6. Step 6: Final answer
    x = 82.98

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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.