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Finding the Fourth Proportional to 73.17, 109.58 and 42.66

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Solution

The fourth proportional to 73.17, 109.58 and 42.66 is: 63.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.17 : 109.58 = 42.66 : x
  2. Step 2: Convert to fraction form
    73.17/109.58 = 42.66/x
  3. Step 3: Cross multiply
    73.17x = 109.58 × 42.66
  4. Step 4: Simplify right side
    73.17x = 4,674.47
  5. Step 5: Solve for x
    x = 4,674.47/73.17
  6. Step 6: Final answer
    x = 63.89

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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.