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Finding the Fourth Proportional to 98.93, 136.35 and 79.23

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Solution

The fourth proportional to 98.93, 136.35 and 79.23 is: 109.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.93 : 136.35 = 79.23 : x
  2. Step 2: Convert to fraction form
    98.93/136.35 = 79.23/x
  3. Step 3: Cross multiply
    98.93x = 136.35 × 79.23
  4. Step 4: Simplify right side
    98.93x = 10,802.13
  5. Step 5: Solve for x
    x = 10,802.13/98.93
  6. Step 6: Final answer
    x = 109.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.