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Finding the Fourth Proportional to 154.05, 212.47 and 104.84

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Solution

The fourth proportional to 154.05, 212.47 and 104.84 is: 144.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.05 : 212.47 = 104.84 : x
  2. Step 2: Convert to fraction form
    154.05/212.47 = 104.84/x
  3. Step 3: Cross multiply
    154.05x = 212.47 × 104.84
  4. Step 4: Simplify right side
    154.05x = 22,275.35
  5. Step 5: Solve for x
    x = 22,275.35/154.05
  6. Step 6: Final answer
    x = 144.60

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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.