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Finding the Fourth Proportional to 131.22, 180.83 and 124.13

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Solution

The fourth proportional to 131.22, 180.83 and 124.13 is: 171.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.22 : 180.83 = 124.13 : x
  2. Step 2: Convert to fraction form
    131.22/180.83 = 124.13/x
  3. Step 3: Cross multiply
    131.22x = 180.83 × 124.13
  4. Step 4: Simplify right side
    131.22x = 22,447.19
  5. Step 5: Solve for x
    x = 22,447.19/131.22
  6. Step 6: Final answer
    x = 171.07

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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.