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Finding the Fourth Proportional to 192.04, 288.02 and 100.78

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Solution

The fourth proportional to 192.04, 288.02 and 100.78 is: 151.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.04 : 288.02 = 100.78 : x
  2. Step 2: Convert to fraction form
    192.04/288.02 = 100.78/x
  3. Step 3: Cross multiply
    192.04x = 288.02 × 100.78
  4. Step 4: Simplify right side
    192.04x = 29,026.19
  5. Step 5: Solve for x
    x = 29,026.19/192.04
  6. Step 6: Final answer
    x = 151.15

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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.