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Finding the Fourth Proportional to 158.79, 219.15 and 93.32

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Solution

The fourth proportional to 158.79, 219.15 and 93.32 is: 128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.79 : 219.15 = 93.32 : x
  2. Step 2: Convert to fraction form
    158.79/219.15 = 93.32/x
  3. Step 3: Cross multiply
    158.79x = 219.15 × 93.32
  4. Step 4: Simplify right side
    158.79x = 20,449.52
  5. Step 5: Solve for x
    x = 20,449.52/158.79
  6. Step 6: Final answer
    x = 128.78

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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.