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Finding the Fourth Proportional to 141.42, 210.89 and 130.20

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Solution

The fourth proportional to 141.42, 210.89 and 130.20 is: 194.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.42 : 210.89 = 130.20 : x
  2. Step 2: Convert to fraction form
    141.42/210.89 = 130.20/x
  3. Step 3: Cross multiply
    141.42x = 210.89 × 130.20
  4. Step 4: Simplify right side
    141.42x = 27,458.41
  5. Step 5: Solve for x
    x = 27,458.41/141.42
  6. Step 6: Final answer
    x = 194.16

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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.