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Finding the Fourth Proportional to 139,703.63, 209,596.82 and 80,581.73

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Solution

The fourth proportional to 139,703.63, 209,596.82 and 80,581.73 is: 120,896.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,703.63 : 209,596.82 = 80,581.73 : x
  2. Step 2: Convert to fraction form
    139,703.63/209,596.82 = 80,581.73/x
  3. Step 3: Cross multiply
    139,703.63x = 209,596.82 × 80,581.73
  4. Step 4: Simplify right side
    139,703.63x = 16,889,672,907.21
  5. Step 5: Solve for x
    x = 16,889,672,907.21/139,703.63
  6. Step 6: Final answer
    x = 120,896.45

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1.5x scale

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.