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Finding the Fourth Proportional to 80,485.65, 120,689.60 and 47,216.52

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Solution

The fourth proportional to 80,485.65, 120,689.60 and 47,216.52 is: 70,801.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.65 : 120,689.60 = 47,216.52 : x
  2. Step 2: Convert to fraction form
    80,485.65/120,689.60 = 47,216.52/x
  3. Step 3: Cross multiply
    80,485.65x = 120,689.60 × 47,216.52
  4. Step 4: Simplify right side
    80,485.65x = 5,698,542,676.11
  5. Step 5: Solve for x
    x = 5,698,542,676.11/80,485.65
  6. Step 6: Final answer
    x = 70,801.97

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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.