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Finding the Fourth Proportional to 74,090.72, 111,198.24 and 69,419.84

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Solution

The fourth proportional to 74,090.72, 111,198.24 and 69,419.84 is: 104,188.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,090.72 : 111,198.24 = 69,419.84 : x
  2. Step 2: Convert to fraction form
    74,090.72/111,198.24 = 69,419.84/x
  3. Step 3: Cross multiply
    74,090.72x = 111,198.24 × 69,419.84
  4. Step 4: Simplify right side
    74,090.72x = 7,719,364,029.08
  5. Step 5: Solve for x
    x = 7,719,364,029.08/74,090.72
  6. Step 6: Final answer
    x = 104,188.00

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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.