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Finding the Fourth Proportional to 88.18, 132.36 and 65.50

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Solution

The fourth proportional to 88.18, 132.36 and 65.50 is: 98.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.18 : 132.36 = 65.50 : x
  2. Step 2: Convert to fraction form
    88.18/132.36 = 65.50/x
  3. Step 3: Cross multiply
    88.18x = 132.36 × 65.50
  4. Step 4: Simplify right side
    88.18x = 8,669.58
  5. Step 5: Solve for x
    x = 8,669.58/88.18
  6. Step 6: Final answer
    x = 98.32

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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.