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Finding the Fourth Proportional to 143.08, 214.58 and 45.59

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Solution

The fourth proportional to 143.08, 214.58 and 45.59 is: 68.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.08 : 214.58 = 45.59 : x
  2. Step 2: Convert to fraction form
    143.08/214.58 = 45.59/x
  3. Step 3: Cross multiply
    143.08x = 214.58 × 45.59
  4. Step 4: Simplify right side
    143.08x = 9,781.74
  5. Step 5: Solve for x
    x = 9,781.74/143.08
  6. Step 6: Final answer
    x = 68.37

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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.