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Finding the Fourth Proportional to 88.63, 122.28 and 61.03

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Solution

The fourth proportional to 88.63, 122.28 and 61.03 is: 84.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.63 : 122.28 = 61.03 : x
  2. Step 2: Convert to fraction form
    88.63/122.28 = 61.03/x
  3. Step 3: Cross multiply
    88.63x = 122.28 × 61.03
  4. Step 4: Simplify right side
    88.63x = 7,462.75
  5. Step 5: Solve for x
    x = 7,462.75/88.63
  6. Step 6: Final answer
    x = 84.20

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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.