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Finding the Fourth Proportional to 73,690.54, 110,535.45 and 21,100

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Solution

The fourth proportional to 73,690.54, 110,535.45 and 21,100 is: 31,649.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,690.54 : 110,535.45 = 21,100 : x
  2. Step 2: Convert to fraction form
    73,690.54/110,535.45 = 21,100/x
  3. Step 3: Cross multiply
    73,690.54x = 110,535.45 × 21,100
  4. Step 4: Simplify right side
    73,690.54x = 2,332,297,995
  5. Step 5: Solve for x
    x = 2,332,297,995/73,690.54
  6. Step 6: Final answer
    x = 31,649.90

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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.