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Finding the Fourth Proportional to 88.23, 121.50 and 79.14

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Solution

The fourth proportional to 88.23, 121.50 and 79.14 is: 108.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.23 : 121.50 = 79.14 : x
  2. Step 2: Convert to fraction form
    88.23/121.50 = 79.14/x
  3. Step 3: Cross multiply
    88.23x = 121.50 × 79.14
  4. Step 4: Simplify right side
    88.23x = 9,615.51
  5. Step 5: Solve for x
    x = 9,615.51/88.23
  6. Step 6: Final answer
    x = 108.98

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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.