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Finding the Fourth Proportional to 88.76, 122.40 and 69.14

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Solution

The fourth proportional to 88.76, 122.40 and 69.14 is: 95.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.76 : 122.40 = 69.14 : x
  2. Step 2: Convert to fraction form
    88.76/122.40 = 69.14/x
  3. Step 3: Cross multiply
    88.76x = 122.40 × 69.14
  4. Step 4: Simplify right side
    88.76x = 8,462.74
  5. Step 5: Solve for x
    x = 8,462.74/88.76
  6. Step 6: Final answer
    x = 95.34

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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.