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Finding the Fourth Proportional to 74,238.08, 111,363.60 and 18,834.08

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Solution

The fourth proportional to 74,238.08, 111,363.60 and 18,834.08 is: 28,252.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,238.08 : 111,363.60 = 18,834.08 : x
  2. Step 2: Convert to fraction form
    74,238.08/111,363.60 = 18,834.08/x
  3. Step 3: Cross multiply
    74,238.08x = 111,363.60 × 18,834.08
  4. Step 4: Simplify right side
    74,238.08x = 2,097,430,951.49
  5. Step 5: Solve for x
    x = 2,097,430,951.49/74,238.08
  6. Step 6: Final answer
    x = 28,252.76

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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.