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Finding the Fourth Proportional to 66,917.04, 100,408.32 and 47,321.52

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Solution

The fourth proportional to 66,917.04, 100,408.32 and 47,321.52 is: 71,005.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,917.04 : 100,408.32 = 47,321.52 : x
  2. Step 2: Convert to fraction form
    66,917.04/100,408.32 = 47,321.52/x
  3. Step 3: Cross multiply
    66,917.04x = 100,408.32 × 47,321.52
  4. Step 4: Simplify right side
    66,917.04x = 4,751,474,323.05
  5. Step 5: Solve for x
    x = 4,751,474,323.05/66,917.04
  6. Step 6: Final answer
    x = 71,005.45

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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.