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Finding the Fourth Proportional to 66,622.44, 91,893.87 and 42,778.05

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Solution

The fourth proportional to 66,622.44, 91,893.87 and 42,778.05 is: 59,004.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,622.44 : 91,893.87 = 42,778.05 : x
  2. Step 2: Convert to fraction form
    66,622.44/91,893.87 = 42,778.05/x
  3. Step 3: Cross multiply
    66,622.44x = 91,893.87 × 42,778.05
  4. Step 4: Simplify right side
    66,622.44x = 3,931,040,565.55
  5. Step 5: Solve for x
    x = 3,931,040,565.55/66,622.44
  6. Step 6: Final answer
    x = 59,004.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.