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Finding the Fourth Proportional to 146.94, 202.74 and 81.43

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Solution

The fourth proportional to 146.94, 202.74 and 81.43 is: 112.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.94 : 202.74 = 81.43 : x
  2. Step 2: Convert to fraction form
    146.94/202.74 = 81.43/x
  3. Step 3: Cross multiply
    146.94x = 202.74 × 81.43
  4. Step 4: Simplify right side
    146.94x = 16,509.12
  5. Step 5: Solve for x
    x = 16,509.12/146.94
  6. Step 6: Final answer
    x = 112.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.