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Finding the Fourth Proportional to 143.96, 214.98 and 125.72

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Solution

The fourth proportional to 143.96, 214.98 and 125.72 is: 187.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.96 : 214.98 = 125.72 : x
  2. Step 2: Convert to fraction form
    143.96/214.98 = 125.72/x
  3. Step 3: Cross multiply
    143.96x = 214.98 × 125.72
  4. Step 4: Simplify right side
    143.96x = 27,027.29
  5. Step 5: Solve for x
    x = 27,027.29/143.96
  6. Step 6: Final answer
    x = 187.74

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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.