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Finding the Fourth Proportional to 158.93, 219.20 and 103.68

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Solution

The fourth proportional to 158.93, 219.20 and 103.68 is: 143.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.93 : 219.20 = 103.68 : x
  2. Step 2: Convert to fraction form
    158.93/219.20 = 103.68/x
  3. Step 3: Cross multiply
    158.93x = 219.20 × 103.68
  4. Step 4: Simplify right side
    158.93x = 22,726.14
  5. Step 5: Solve for x
    x = 22,726.14/158.93
  6. Step 6: Final answer
    x = 143.00

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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.