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Finding the Fourth Proportional to 88.77, 122.49 and 79.05

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Solution

The fourth proportional to 88.77, 122.49 and 79.05 is: 109.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.77 : 122.49 = 79.05 : x
  2. Step 2: Convert to fraction form
    88.77/122.49 = 79.05/x
  3. Step 3: Cross multiply
    88.77x = 122.49 × 79.05
  4. Step 4: Simplify right side
    88.77x = 9,682.83
  5. Step 5: Solve for x
    x = 9,682.83/88.77
  6. Step 6: Final answer
    x = 109.08

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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.