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Finding the Fourth Proportional to 79, 119.10 and 72.32

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Solution

The fourth proportional to 79, 119.10 and 72.32 is: 109.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    79 : 119.10 = 72.32 : x
  2. Step 2: Convert to fraction form
    79/119.10 = 72.32/x
  3. Step 3: Cross multiply
    79x = 119.10 × 72.32
  4. Step 4: Simplify right side
    79x = 8,613.31
  5. Step 5: Solve for x
    x = 8,613.31/79
  6. Step 6: Final answer
    x = 109.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.