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Finding the Fourth Proportional to 74,274.51, 111,410.45 and 68,489.09

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Solution

The fourth proportional to 74,274.51, 111,410.45 and 68,489.09 is: 102,732.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,274.51 : 111,410.45 = 68,489.09 : x
  2. Step 2: Convert to fraction form
    74,274.51/111,410.45 = 68,489.09/x
  3. Step 3: Cross multiply
    74,274.51x = 111,410.45 × 68,489.09
  4. Step 4: Simplify right side
    74,274.51x = 7,630,400,835.11
  5. Step 5: Solve for x
    x = 7,630,400,835.11/74,274.51
  6. Step 6: Final answer
    x = 102,732.43

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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.