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Finding the Fourth Proportional to 78,704.49, 108,609.03 and 42,893.73

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Solution

The fourth proportional to 78,704.49, 108,609.03 and 42,893.73 is: 59,191.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,704.49 : 108,609.03 = 42,893.73 : x
  2. Step 2: Convert to fraction form
    78,704.49/108,609.03 = 42,893.73/x
  3. Step 3: Cross multiply
    78,704.49x = 108,609.03 × 42,893.73
  4. Step 4: Simplify right side
    78,704.49x = 4,658,646,193.91
  5. Step 5: Solve for x
    x = 4,658,646,193.91/78,704.49
  6. Step 6: Final answer
    x = 59,191.62

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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.