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Finding the Fourth Proportional to 128.94, 191.82 and 127.59

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Solution

The fourth proportional to 128.94, 191.82 and 127.59 is: 189.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.94 : 191.82 = 127.59 : x
  2. Step 2: Convert to fraction form
    128.94/191.82 = 127.59/x
  3. Step 3: Cross multiply
    128.94x = 191.82 × 127.59
  4. Step 4: Simplify right side
    128.94x = 24,474.31
  5. Step 5: Solve for x
    x = 24,474.31/128.94
  6. Step 6: Final answer
    x = 189.81

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