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Finding the Fourth Proportional to 73.02, 109.04 and 66.18

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Solution

The fourth proportional to 73.02, 109.04 and 66.18 is: 98.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.02 : 109.04 = 66.18 : x
  2. Step 2: Convert to fraction form
    73.02/109.04 = 66.18/x
  3. Step 3: Cross multiply
    73.02x = 109.04 × 66.18
  4. Step 4: Simplify right side
    73.02x = 7,215.94
  5. Step 5: Solve for x
    x = 7,215.94/73.02
  6. Step 6: Final answer
    x = 98.82

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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.