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Finding the Fourth Proportional to 154.04, 212.57 and 88.54

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Solution

The fourth proportional to 154.04, 212.57 and 88.54 is: 122.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.04 : 212.57 = 88.54 : x
  2. Step 2: Convert to fraction form
    154.04/212.57 = 88.54/x
  3. Step 3: Cross multiply
    154.04x = 212.57 × 88.54
  4. Step 4: Simplify right side
    154.04x = 18,820.95
  5. Step 5: Solve for x
    x = 18,820.95/154.04
  6. Step 6: Final answer
    x = 122.18

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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.