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Finding the Fourth Proportional to 111.84, 154.26 and 75.03

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Solution

The fourth proportional to 111.84, 154.26 and 75.03 is: 103.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.84 : 154.26 = 75.03 : x
  2. Step 2: Convert to fraction form
    111.84/154.26 = 75.03/x
  3. Step 3: Cross multiply
    111.84x = 154.26 × 75.03
  4. Step 4: Simplify right side
    111.84x = 11,574.13
  5. Step 5: Solve for x
    x = 11,574.13/111.84
  6. Step 6: Final answer
    x = 103.49

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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.