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Finding the Fourth Proportional to 111,004.40, 166,409.40 and 66,648.80

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Solution

The fourth proportional to 111,004.40, 166,409.40 and 66,648.80 is: 99,914.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,004.40 : 166,409.40 = 66,648.80 : x
  2. Step 2: Convert to fraction form
    111,004.40/166,409.40 = 66,648.80/x
  3. Step 3: Cross multiply
    111,004.40x = 166,409.40 × 66,648.80
  4. Step 4: Simplify right side
    111,004.40x = 11,090,986,818.72
  5. Step 5: Solve for x
    x = 11,090,986,818.72/111,004.40
  6. Step 6: Final answer
    x = 99,914.84

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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.