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Finding the Fourth Proportional to 120.07, 179.85 and 89.30

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Solution

The fourth proportional to 120.07, 179.85 and 89.30 is: 133.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.07 : 179.85 = 89.30 : x
  2. Step 2: Convert to fraction form
    120.07/179.85 = 89.30/x
  3. Step 3: Cross multiply
    120.07x = 179.85 × 89.30
  4. Step 4: Simplify right side
    120.07x = 16,061.39
  5. Step 5: Solve for x
    x = 16,061.39/120.07
  6. Step 6: Final answer
    x = 133.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.