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Finding the Fourth Proportional to 141.18, 210.43 and 133.34

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Solution

The fourth proportional to 141.18, 210.43 and 133.34 is: 198.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.18 : 210.43 = 133.34 : x
  2. Step 2: Convert to fraction form
    141.18/210.43 = 133.34/x
  3. Step 3: Cross multiply
    141.18x = 210.43 × 133.34
  4. Step 4: Simplify right side
    141.18x = 28,058.74
  5. Step 5: Solve for x
    x = 28,058.74/141.18
  6. Step 6: Final answer
    x = 198.74

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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.