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Finding the Fourth Proportional to 154.00, 212.32 and 117.10

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Solution

The fourth proportional to 154.00, 212.32 and 117.10 is: 161.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.00 : 212.32 = 117.10 : x
  2. Step 2: Convert to fraction form
    154.00/212.32 = 117.10/x
  3. Step 3: Cross multiply
    154.00x = 212.32 × 117.10
  4. Step 4: Simplify right side
    154.00x = 24,861.89
  5. Step 5: Solve for x
    x = 24,861.89/154.00
  6. Step 6: Final answer
    x = 161.44

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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.