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Finding the Fourth Proportional to 79.37, 118.33 and 71.50

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Solution

The fourth proportional to 79.37, 118.33 and 71.50 is: 106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79.37 : 118.33 = 71.50 : x
  2. Step 2: Convert to fraction form
    79.37/118.33 = 71.50/x
  3. Step 3: Cross multiply
    79.37x = 118.33 × 71.50
  4. Step 4: Simplify right side
    79.37x = 8,460.60
  5. Step 5: Solve for x
    x = 8,460.60/79.37
  6. Step 6: Final answer
    x = 106.60

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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.