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Finding the Fourth Proportional to 159.55, 219.98 and 137.37

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Solution

The fourth proportional to 159.55, 219.98 and 137.37 is: 189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.55 : 219.98 = 137.37 : x
  2. Step 2: Convert to fraction form
    159.55/219.98 = 137.37/x
  3. Step 3: Cross multiply
    159.55x = 219.98 × 137.37
  4. Step 4: Simplify right side
    159.55x = 30,218.52
  5. Step 5: Solve for x
    x = 30,218.52/159.55
  6. Step 6: Final answer
    x = 189.40

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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.