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Finding the Fourth Proportional to 188.08, 282.12 and 79.80

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Solution

The fourth proportional to 188.08, 282.12 and 79.80 is: 119.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.08 : 282.12 = 79.80 : x
  2. Step 2: Convert to fraction form
    188.08/282.12 = 79.80/x
  3. Step 3: Cross multiply
    188.08x = 282.12 × 79.80
  4. Step 4: Simplify right side
    188.08x = 22,513.18
  5. Step 5: Solve for x
    x = 22,513.18/188.08
  6. Step 6: Final answer
    x = 119.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.