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Finding the Fourth Proportional to 131.50, 181.53 and 102.43

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Solution

The fourth proportional to 131.50, 181.53 and 102.43 is: 141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.50 : 181.53 = 102.43 : x
  2. Step 2: Convert to fraction form
    131.50/181.53 = 102.43/x
  3. Step 3: Cross multiply
    131.50x = 181.53 × 102.43
  4. Step 4: Simplify right side
    131.50x = 18,594.12
  5. Step 5: Solve for x
    x = 18,594.12/131.50
  6. Step 6: Final answer
    x = 141.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.