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Finding the Fourth Proportional to 88.35, 133.20 and 82.47

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Solution

The fourth proportional to 88.35, 133.20 and 82.47 is: 124.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.35 : 133.20 = 82.47 : x
  2. Step 2: Convert to fraction form
    88.35/133.20 = 82.47/x
  3. Step 3: Cross multiply
    88.35x = 133.20 × 82.47
  4. Step 4: Simplify right side
    88.35x = 10,985.00
  5. Step 5: Solve for x
    x = 10,985.00/88.35
  6. Step 6: Final answer
    x = 124.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.