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Finding the Fourth Proportional to 143.32, 214.44 and 102.40

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Solution

The fourth proportional to 143.32, 214.44 and 102.40 is: 153.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.32 : 214.44 = 102.40 : x
  2. Step 2: Convert to fraction form
    143.32/214.44 = 102.40/x
  3. Step 3: Cross multiply
    143.32x = 214.44 × 102.40
  4. Step 4: Simplify right side
    143.32x = 21,958.66
  5. Step 5: Solve for x
    x = 21,958.66/143.32
  6. Step 6: Final answer
    x = 153.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.