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Finding the Fourth Proportional to 145.22, 199.31 and 141.17

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Solution

The fourth proportional to 145.22, 199.31 and 141.17 is: 193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.22 : 199.31 = 141.17 : x
  2. Step 2: Convert to fraction form
    145.22/199.31 = 141.17/x
  3. Step 3: Cross multiply
    145.22x = 199.31 × 141.17
  4. Step 4: Simplify right side
    145.22x = 28,135.89
  5. Step 5: Solve for x
    x = 28,135.89/145.22
  6. Step 6: Final answer
    x = 193.75

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.