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Finding the Fourth Proportional to 102.67, 153.08 and 100.84

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Solution

The fourth proportional to 102.67, 153.08 and 100.84 is: 150.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.67 : 153.08 = 100.84 : x
  2. Step 2: Convert to fraction form
    102.67/153.08 = 100.84/x
  3. Step 3: Cross multiply
    102.67x = 153.08 × 100.84
  4. Step 4: Simplify right side
    102.67x = 15,436.59
  5. Step 5: Solve for x
    x = 15,436.59/102.67
  6. Step 6: Final answer
    x = 150.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.