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Finding the Fourth Proportional to 111.13, 153.03 and 105.01

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Solution

The fourth proportional to 111.13, 153.03 and 105.01 is: 144.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.13 : 153.03 = 105.01 : x
  2. Step 2: Convert to fraction form
    111.13/153.03 = 105.01/x
  3. Step 3: Cross multiply
    111.13x = 153.03 × 105.01
  4. Step 4: Simplify right side
    111.13x = 16,069.68
  5. Step 5: Solve for x
    x = 16,069.68/111.13
  6. Step 6: Final answer
    x = 144.60

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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.