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Finding the Fourth Proportional to 154.12, 212.50 and 134.45

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Solution

The fourth proportional to 154.12, 212.50 and 134.45 is: 185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.12 : 212.50 = 134.45 : x
  2. Step 2: Convert to fraction form
    154.12/212.50 = 134.45/x
  3. Step 3: Cross multiply
    154.12x = 212.50 × 134.45
  4. Step 4: Simplify right side
    154.12x = 28,569.95
  5. Step 5: Solve for x
    x = 28,569.95/154.12
  6. Step 6: Final answer
    x = 185.37

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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.