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Finding the Fourth Proportional to 158.08, 218.15 and 89.08

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Solution

The fourth proportional to 158.08, 218.15 and 89.08 is: 122.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.08 : 218.15 = 89.08 : x
  2. Step 2: Convert to fraction form
    158.08/218.15 = 89.08/x
  3. Step 3: Cross multiply
    158.08x = 218.15 × 89.08
  4. Step 4: Simplify right side
    158.08x = 19,432.58
  5. Step 5: Solve for x
    x = 19,432.58/158.08
  6. Step 6: Final answer
    x = 122.93

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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.