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Finding the Fourth Proportional to 139,161.63, 208,723.77 and 39,329.64

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Solution

The fourth proportional to 139,161.63, 208,723.77 and 39,329.64 is: 58,989.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,161.63 : 208,723.77 = 39,329.64 : x
  2. Step 2: Convert to fraction form
    139,161.63/208,723.77 = 39,329.64/x
  3. Step 3: Cross multiply
    139,161.63x = 208,723.77 × 39,329.64
  4. Step 4: Simplify right side
    139,161.63x = 8,209,030,733.54
  5. Step 5: Solve for x
    x = 8,209,030,733.54/139,161.63
  6. Step 6: Final answer
    x = 58,989.18

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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.