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Finding the Fourth Proportional to 192.96, 266.48 and 130.80

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Solution

The fourth proportional to 192.96, 266.48 and 130.80 is: 180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.96 : 266.48 = 130.80 : x
  2. Step 2: Convert to fraction form
    192.96/266.48 = 130.80/x
  3. Step 3: Cross multiply
    192.96x = 266.48 × 130.80
  4. Step 4: Simplify right side
    192.96x = 34,855.58
  5. Step 5: Solve for x
    x = 34,855.58/192.96
  6. Step 6: Final answer
    x = 180.64

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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.