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Finding the Fourth Proportional to 102.52, 153.60 and 70.48

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Solution

The fourth proportional to 102.52, 153.60 and 70.48 is: 105.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102.52 : 153.60 = 70.48 : x
  2. Step 2: Convert to fraction form
    102.52/153.60 = 70.48/x
  3. Step 3: Cross multiply
    102.52x = 153.60 × 70.48
  4. Step 4: Simplify right side
    102.52x = 10,825.73
  5. Step 5: Solve for x
    x = 10,825.73/102.52
  6. Step 6: Final answer
    x = 105.60

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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.