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Finding the Fourth Proportional to 145.98, 219.97 and 120.86

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Solution

The fourth proportional to 145.98, 219.97 and 120.86 is: 182.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.98 : 219.97 = 120.86 : x
  2. Step 2: Convert to fraction form
    145.98/219.97 = 120.86/x
  3. Step 3: Cross multiply
    145.98x = 219.97 × 120.86
  4. Step 4: Simplify right side
    145.98x = 26,585.97
  5. Step 5: Solve for x
    x = 26,585.97/145.98
  6. Step 6: Final answer
    x = 182.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.