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Finding the Fourth Proportional to 159.66, 220.27 and 90.66

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Solution

The fourth proportional to 159.66, 220.27 and 90.66 is: 125.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.66 : 220.27 = 90.66 : x
  2. Step 2: Convert to fraction form
    159.66/220.27 = 90.66/x
  3. Step 3: Cross multiply
    159.66x = 220.27 × 90.66
  4. Step 4: Simplify right side
    159.66x = 19,969.68
  5. Step 5: Solve for x
    x = 19,969.68/159.66
  6. Step 6: Final answer
    x = 125.08

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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.