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Finding the Fourth Proportional to 154.94, 214.09 and 118.40

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Solution

The fourth proportional to 154.94, 214.09 and 118.40 is: 163.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.94 : 214.09 = 118.40 : x
  2. Step 2: Convert to fraction form
    154.94/214.09 = 118.40/x
  3. Step 3: Cross multiply
    154.94x = 214.09 × 118.40
  4. Step 4: Simplify right side
    154.94x = 25,346.89
  5. Step 5: Solve for x
    x = 25,346.89/154.94
  6. Step 6: Final answer
    x = 163.60

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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.