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Finding the Fourth Proportional to 75.04, 111.94 and 71.60

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Solution

The fourth proportional to 75.04, 111.94 and 71.60 is: 106.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.04 : 111.94 = 71.60 : x
  2. Step 2: Convert to fraction form
    75.04/111.94 = 71.60/x
  3. Step 3: Cross multiply
    75.04x = 111.94 × 71.60
  4. Step 4: Simplify right side
    75.04x = 8,014.90
  5. Step 5: Solve for x
    x = 8,014.90/75.04
  6. Step 6: Final answer
    x = 106.81

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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.