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Finding the Fourth Proportional to 145.13, 217.08 and 120.38

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Solution

The fourth proportional to 145.13, 217.08 and 120.38 is: 180.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.13 : 217.08 = 120.38 : x
  2. Step 2: Convert to fraction form
    145.13/217.08 = 120.38/x
  3. Step 3: Cross multiply
    145.13x = 217.08 × 120.38
  4. Step 4: Simplify right side
    145.13x = 26,131.01
  5. Step 5: Solve for x
    x = 26,131.01/145.13
  6. Step 6: Final answer
    x = 180.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.