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Finding the Fourth Proportional to 78,704.36, 108,608.85 and 42,893.60

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Solution

The fourth proportional to 78,704.36, 108,608.85 and 42,893.60 is: 59,191.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,704.36 : 108,608.85 = 42,893.60 : x
  2. Step 2: Convert to fraction form
    78,704.36/108,608.85 = 42,893.60/x
  3. Step 3: Cross multiply
    78,704.36x = 108,608.85 × 42,893.60
  4. Step 4: Simplify right side
    78,704.36x = 4,658,624,839.88
  5. Step 5: Solve for x
    x = 4,658,624,839.88/78,704.36
  6. Step 6: Final answer
    x = 59,191.44

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1.5x scale

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.