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Finding the Fourth Proportional to 159.30, 219.78 and 93.76

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Solution

The fourth proportional to 159.30, 219.78 and 93.76 is: 129.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.30 : 219.78 = 93.76 : x
  2. Step 2: Convert to fraction form
    159.30/219.78 = 93.76/x
  3. Step 3: Cross multiply
    159.30x = 219.78 × 93.76
  4. Step 4: Simplify right side
    159.30x = 20,606.02
  5. Step 5: Solve for x
    x = 20,606.02/159.30
  6. Step 6: Final answer
    x = 129.35

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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.