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Finding the Fourth Proportional to 139,263.57, 208,861.67 and 64,311.64

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Solution

The fourth proportional to 139,263.57, 208,861.67 and 64,311.64 is: 96,451.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,263.57 : 208,861.67 = 64,311.64 : x
  2. Step 2: Convert to fraction form
    139,263.57/208,861.67 = 64,311.64/x
  3. Step 3: Cross multiply
    139,263.57x = 208,861.67 × 64,311.64
  4. Step 4: Simplify right side
    139,263.57x = 13,432,236,169.46
  5. Step 5: Solve for x
    x = 13,432,236,169.46/139,263.57
  6. Step 6: Final answer
    x = 96,451.90

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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.