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Finding the Fourth Proportional to 94.84, 142.02 and 90.43

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Solution

The fourth proportional to 94.84, 142.02 and 90.43 is: 135.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.84 : 142.02 = 90.43 : x
  2. Step 2: Convert to fraction form
    94.84/142.02 = 90.43/x
  3. Step 3: Cross multiply
    94.84x = 142.02 × 90.43
  4. Step 4: Simplify right side
    94.84x = 12,842.51
  5. Step 5: Solve for x
    x = 12,842.51/94.84
  6. Step 6: Final answer
    x = 135.42

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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.