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Finding the Fourth Proportional to 80,695.44, 120,938.94 and 67,285.01

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Solution

The fourth proportional to 80,695.44, 120,938.94 and 67,285.01 is: 100,840.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,695.44 : 120,938.94 = 67,285.01 : x
  2. Step 2: Convert to fraction form
    80,695.44/120,938.94 = 67,285.01/x
  3. Step 3: Cross multiply
    80,695.44x = 120,938.94 × 67,285.01
  4. Step 4: Simplify right side
    80,695.44x = 8,137,378,089.64
  5. Step 5: Solve for x
    x = 8,137,378,089.64/80,695.44
  6. Step 6: Final answer
    x = 100,840.62

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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.