Home / 139,131.12-208,652.88-45,615

Finding the Fourth Proportional to 139,131.12, 208,652.88 and 45,615

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Solution

The fourth proportional to 139,131.12, 208,652.88 and 45,615 is: 68,408.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,131.12 : 208,652.88 = 45,615 : x
  2. Step 2: Convert to fraction form
    139,131.12/208,652.88 = 45,615/x
  3. Step 3: Cross multiply
    139,131.12x = 208,652.88 × 45,615
  4. Step 4: Simplify right side
    139,131.12x = 9,517,701,121.20
  5. Step 5: Solve for x
    x = 9,517,701,121.20/139,131.12
  6. Step 6: Final answer
    x = 68,408.14

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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.