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Finding the Fourth Proportional to 181.51, 250.61 and 139.99

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Solution

The fourth proportional to 181.51, 250.61 and 139.99 is: 193.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    181.51 : 250.61 = 139.99 : x
  2. Step 2: Convert to fraction form
    181.51/250.61 = 139.99/x
  3. Step 3: Cross multiply
    181.51x = 250.61 × 139.99
  4. Step 4: Simplify right side
    181.51x = 35,082.89
  5. Step 5: Solve for x
    x = 35,082.89/181.51
  6. Step 6: Final answer
    x = 193.28

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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.