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Finding the Fourth Proportional to 159.05, 219.47 and 89.10

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Solution

The fourth proportional to 159.05, 219.47 and 89.10 is: 122.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.05 : 219.47 = 89.10 : x
  2. Step 2: Convert to fraction form
    159.05/219.47 = 89.10/x
  3. Step 3: Cross multiply
    159.05x = 219.47 × 89.10
  4. Step 4: Simplify right side
    159.05x = 19,554.55
  5. Step 5: Solve for x
    x = 19,554.55/159.05
  6. Step 6: Final answer
    x = 122.95

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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.