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Finding the Fourth Proportional to 139,451.37, 209,259.05 and 55,219.65

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Solution

The fourth proportional to 139,451.37, 209,259.05 and 55,219.65 is: 82,861.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,451.37 : 209,259.05 = 55,219.65 : x
  2. Step 2: Convert to fraction form
    139,451.37/209,259.05 = 55,219.65/x
  3. Step 3: Cross multiply
    139,451.37x = 209,259.05 × 55,219.65
  4. Step 4: Simplify right side
    139,451.37x = 11,555,211,224.23
  5. Step 5: Solve for x
    x = 11,555,211,224.23/139,451.37
  6. Step 6: Final answer
    x = 82,861.94

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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.