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Finding the Fourth Proportional to 88.52, 122 and 72.88

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Solution

The fourth proportional to 88.52, 122 and 72.88 is: 100.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.52 : 122 = 72.88 : x
  2. Step 2: Convert to fraction form
    88.52/122 = 72.88/x
  3. Step 3: Cross multiply
    88.52x = 122 × 72.88
  4. Step 4: Simplify right side
    88.52x = 8,891.36
  5. Step 5: Solve for x
    x = 8,891.36/88.52
  6. Step 6: Final answer
    x = 100.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.