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Finding the Fourth Proportional to 158.94, 219.29 and 103.75

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Solution

The fourth proportional to 158.94, 219.29 and 103.75 is: 143.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.94 : 219.29 = 103.75 : x
  2. Step 2: Convert to fraction form
    158.94/219.29 = 103.75/x
  3. Step 3: Cross multiply
    158.94x = 219.29 × 103.75
  4. Step 4: Simplify right side
    158.94x = 22,750.82
  5. Step 5: Solve for x
    x = 22,750.82/158.94
  6. Step 6: Final answer
    x = 143.14

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.