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Finding the Fourth Proportional to 111.11, 165.80 and 98.07

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Solution

The fourth proportional to 111.11, 165.80 and 98.07 is: 146.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.11 : 165.80 = 98.07 : x
  2. Step 2: Convert to fraction form
    111.11/165.80 = 98.07/x
  3. Step 3: Cross multiply
    111.11x = 165.80 × 98.07
  4. Step 4: Simplify right side
    111.11x = 16,259.52
  5. Step 5: Solve for x
    x = 16,259.52/111.11
  6. Step 6: Final answer
    x = 146.34

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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.