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Finding the Fourth Proportional to 141.55, 210.89 and 136.31

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Solution

The fourth proportional to 141.55, 210.89 and 136.31 is: 203.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.55 : 210.89 = 136.31 : x
  2. Step 2: Convert to fraction form
    141.55/210.89 = 136.31/x
  3. Step 3: Cross multiply
    141.55x = 210.89 × 136.31
  4. Step 4: Simplify right side
    141.55x = 28,746.42
  5. Step 5: Solve for x
    x = 28,746.42/141.55
  6. Step 6: Final answer
    x = 203.08

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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.