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Finding the Fourth Proportional to 159.06, 219.18 and 145.09

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Solution

The fourth proportional to 159.06, 219.18 and 145.09 is: 199.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.06 : 219.18 = 145.09 : x
  2. Step 2: Convert to fraction form
    159.06/219.18 = 145.09/x
  3. Step 3: Cross multiply
    159.06x = 219.18 × 145.09
  4. Step 4: Simplify right side
    159.06x = 31,800.83
  5. Step 5: Solve for x
    x = 31,800.83/159.06
  6. Step 6: Final answer
    x = 199.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.