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Finding the Fourth Proportional to 180.63, 249.38 and 139.10

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Solution

The fourth proportional to 180.63, 249.38 and 139.10 is: 192.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.63 : 249.38 = 139.10 : x
  2. Step 2: Convert to fraction form
    180.63/249.38 = 139.10/x
  3. Step 3: Cross multiply
    180.63x = 249.38 × 139.10
  4. Step 4: Simplify right side
    180.63x = 34,688.76
  5. Step 5: Solve for x
    x = 34,688.76/180.63
  6. Step 6: Final answer
    x = 192.04

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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.