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Finding the Fourth Proportional to 88.99, 132.80 and 79.88

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Solution

The fourth proportional to 88.99, 132.80 and 79.88 is: 119.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.99 : 132.80 = 79.88 : x
  2. Step 2: Convert to fraction form
    88.99/132.80 = 79.88/x
  3. Step 3: Cross multiply
    88.99x = 132.80 × 79.88
  4. Step 4: Simplify right side
    88.99x = 10,607.00
  5. Step 5: Solve for x
    x = 10,607.00/88.99
  6. Step 6: Final answer
    x = 119.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.