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Finding the Fourth Proportional to 111,002.40, 166,406.40 and 66,646.80

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Solution

The fourth proportional to 111,002.40, 166,406.40 and 66,646.80 is: 99,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,002.40 : 166,406.40 = 66,646.80 : x
  2. Step 2: Convert to fraction form
    111,002.40/166,406.40 = 66,646.80/x
  3. Step 3: Cross multiply
    111,002.40x = 166,406.40 × 66,646.80
  4. Step 4: Simplify right side
    111,002.40x = 11,090,454,059.52
  5. Step 5: Solve for x
    x = 11,090,454,059.52/111,002.40
  6. Step 6: Final answer
    x = 99,911.84

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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.