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Finding the Fourth Proportional to 102.49, 153.60 and 61.93

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Solution

The fourth proportional to 102.49, 153.60 and 61.93 is: 92.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.49 : 153.60 = 61.93 : x
  2. Step 2: Convert to fraction form
    102.49/153.60 = 61.93/x
  3. Step 3: Cross multiply
    102.49x = 153.60 × 61.93
  4. Step 4: Simplify right side
    102.49x = 9,512.45
  5. Step 5: Solve for x
    x = 9,512.45/102.49
  6. Step 6: Final answer
    x = 92.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.