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Finding the Fourth Proportional to 83.03, 123.59 and 79.07

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Solution

The fourth proportional to 83.03, 123.59 and 79.07 is: 117.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.03 : 123.59 = 79.07 : x
  2. Step 2: Convert to fraction form
    83.03/123.59 = 79.07/x
  3. Step 3: Cross multiply
    83.03x = 123.59 × 79.07
  4. Step 4: Simplify right side
    83.03x = 9,771.25
  5. Step 5: Solve for x
    x = 9,771.25/83.03
  6. Step 6: Final answer
    x = 117.69

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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.