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Finding the Fourth Proportional to 145.59, 217.93 and 108.81

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Solution

The fourth proportional to 145.59, 217.93 and 108.81 is: 162.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.59 : 217.93 = 108.81 : x
  2. Step 2: Convert to fraction form
    145.59/217.93 = 108.81/x
  3. Step 3: Cross multiply
    145.59x = 217.93 × 108.81
  4. Step 4: Simplify right side
    145.59x = 23,713.89
  5. Step 5: Solve for x
    x = 23,713.89/145.59
  6. Step 6: Final answer
    x = 162.88

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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.