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Finding the Fourth Proportional to 73.02, 108.60 and 71.31

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Solution

The fourth proportional to 73.02, 108.60 and 71.31 is: 106.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.02 : 108.60 = 71.31 : x
  2. Step 2: Convert to fraction form
    73.02/108.60 = 71.31/x
  3. Step 3: Cross multiply
    73.02x = 108.60 × 71.31
  4. Step 4: Simplify right side
    73.02x = 7,744.27
  5. Step 5: Solve for x
    x = 7,744.27/73.02
  6. Step 6: Final answer
    x = 106.06

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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.