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Finding the Fourth Proportional to 111,003.40, 166,019.10 and 99,242.20

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Solution

The fourth proportional to 111,003.40, 166,019.10 and 99,242.20 is: 148,428.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,003.40 : 166,019.10 = 99,242.20 : x
  2. Step 2: Convert to fraction form
    111,003.40/166,019.10 = 99,242.20/x
  3. Step 3: Cross multiply
    111,003.40x = 166,019.10 × 99,242.20
  4. Step 4: Simplify right side
    111,003.40x = 16,476,100,726.02
  5. Step 5: Solve for x
    x = 16,476,100,726.02/111,003.40
  6. Step 6: Final answer
    x = 148,428.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.