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Finding the Fourth Proportional to 143.99, 216.76 and 131.23

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Solution

The fourth proportional to 143.99, 216.76 and 131.23 is: 197.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.99 : 216.76 = 131.23 : x
  2. Step 2: Convert to fraction form
    143.99/216.76 = 131.23/x
  3. Step 3: Cross multiply
    143.99x = 216.76 × 131.23
  4. Step 4: Simplify right side
    143.99x = 28,444.99
  5. Step 5: Solve for x
    x = 28,444.99/143.99
  6. Step 6: Final answer
    x = 197.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.