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Finding the Fourth Proportional to 128.53, 192.07 and 94.06

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Solution

The fourth proportional to 128.53, 192.07 and 94.06 is: 140.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.53 : 192.07 = 94.06 : x
  2. Step 2: Convert to fraction form
    128.53/192.07 = 94.06/x
  3. Step 3: Cross multiply
    128.53x = 192.07 × 94.06
  4. Step 4: Simplify right side
    128.53x = 18,066.10
  5. Step 5: Solve for x
    x = 18,066.10/128.53
  6. Step 6: Final answer
    x = 140.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.