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Finding the Fourth Proportional to 158.47, 218.55 and 109.29

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Solution

The fourth proportional to 158.47, 218.55 and 109.29 is: 150.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.47 : 218.55 = 109.29 : x
  2. Step 2: Convert to fraction form
    158.47/218.55 = 109.29/x
  3. Step 3: Cross multiply
    158.47x = 218.55 × 109.29
  4. Step 4: Simplify right side
    158.47x = 23,885.33
  5. Step 5: Solve for x
    x = 23,885.33/158.47
  6. Step 6: Final answer
    x = 150.72

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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.