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Finding the Fourth Proportional to 128.02, 192.06 and 95.86

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Solution

The fourth proportional to 128.02, 192.06 and 95.86 is: 143.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.02 : 192.06 = 95.86 : x
  2. Step 2: Convert to fraction form
    128.02/192.06 = 95.86/x
  3. Step 3: Cross multiply
    128.02x = 192.06 × 95.86
  4. Step 4: Simplify right side
    128.02x = 18,410.87
  5. Step 5: Solve for x
    x = 18,410.87/128.02
  6. Step 6: Final answer
    x = 143.81

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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.