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Finding the Fourth Proportional to 143.10, 213.60 and 124.86

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Solution

The fourth proportional to 143.10, 213.60 and 124.86 is: 186.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.10 : 213.60 = 124.86 : x
  2. Step 2: Convert to fraction form
    143.10/213.60 = 124.86/x
  3. Step 3: Cross multiply
    143.10x = 213.60 × 124.86
  4. Step 4: Simplify right side
    143.10x = 26,670.10
  5. Step 5: Solve for x
    x = 26,670.10/143.10
  6. Step 6: Final answer
    x = 186.37

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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.