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Finding the Fourth Proportional to 111,939.80, 167,763.90 and 45,325.40

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Solution

The fourth proportional to 111,939.80, 167,763.90 and 45,325.40 is: 67,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.80 : 167,763.90 = 45,325.40 : x
  2. Step 2: Convert to fraction form
    111,939.80/167,763.90 = 45,325.40/x
  3. Step 3: Cross multiply
    111,939.80x = 167,763.90 × 45,325.40
  4. Step 4: Simplify right side
    111,939.80x = 7,603,965,873.06
  5. Step 5: Solve for x
    x = 7,603,965,873.06/111,939.80
  6. Step 6: Final answer
    x = 67,929.06

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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.