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Finding the Fourth Proportional to 455,129.01, 682,468.83 and 139,509.81

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Solution

The fourth proportional to 455,129.01, 682,468.83 and 139,509.81 is: 209,195.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,129.01 : 682,468.83 = 139,509.81 : x
  2. Step 2: Convert to fraction form
    455,129.01/682,468.83 = 139,509.81/x
  3. Step 3: Cross multiply
    455,129.01x = 682,468.83 × 139,509.81
  4. Step 4: Simplify right side
    455,129.01x = 95,211,096,804.22
  5. Step 5: Solve for x
    x = 95,211,096,804.22/455,129.01
  6. Step 6: Final answer
    x = 209,195.84

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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.