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Finding the Fourth Proportional to 158.69, 219.04 and 100.51

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Solution

The fourth proportional to 158.69, 219.04 and 100.51 is: 138.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.69 : 219.04 = 100.51 : x
  2. Step 2: Convert to fraction form
    158.69/219.04 = 100.51/x
  3. Step 3: Cross multiply
    158.69x = 219.04 × 100.51
  4. Step 4: Simplify right side
    158.69x = 22,014.91
  5. Step 5: Solve for x
    x = 22,014.91/158.69
  6. Step 6: Final answer
    x = 138.73

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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.