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Finding the Fourth Proportional to 158.90, 219.30 and 93.41

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Solution

The fourth proportional to 158.90, 219.30 and 93.41 is: 128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.90 : 219.30 = 93.41 : x
  2. Step 2: Convert to fraction form
    158.90/219.30 = 93.41/x
  3. Step 3: Cross multiply
    158.90x = 219.30 × 93.41
  4. Step 4: Simplify right side
    158.90x = 20,484.89
  5. Step 5: Solve for x
    x = 20,484.89/158.90
  6. Step 6: Final answer
    x = 128.92

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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.