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Finding the Fourth Proportional to 74,309, 111,454.54 and 18,905.48

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Solution

The fourth proportional to 74,309, 111,454.54 and 18,905.48 is: 28,355.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,309 : 111,454.54 = 18,905.48 : x
  2. Step 2: Convert to fraction form
    74,309/111,454.54 = 18,905.48/x
  3. Step 3: Cross multiply
    74,309x = 111,454.54 × 18,905.48
  4. Step 4: Simplify right side
    74,309x = 2,107,101,576.88
  5. Step 5: Solve for x
    x = 2,107,101,576.88/74,309
  6. Step 6: Final answer
    x = 28,355.94

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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.