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Finding the Fourth Proportional to 111,027.40, 166,443.90 and 66,671.80

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Solution

The fourth proportional to 111,027.40, 166,443.90 and 66,671.80 is: 99,949.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,027.40 : 166,443.90 = 66,671.80 : x
  2. Step 2: Convert to fraction form
    111,027.40/166,443.90 = 66,671.80/x
  3. Step 3: Cross multiply
    111,027.40x = 166,443.90 × 66,671.80
  4. Step 4: Simplify right side
    111,027.40x = 11,097,114,412.02
  5. Step 5: Solve for x
    x = 11,097,114,412.02/111,027.40
  6. Step 6: Final answer
    x = 99,949.33

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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.