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Finding the Fourth Proportional to 315,310.08, 472,834.56 and 128,194.56

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Solution

The fourth proportional to 315,310.08, 472,834.56 and 128,194.56 is: 192,238.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,310.08 : 472,834.56 = 128,194.56 : x
  2. Step 2: Convert to fraction form
    315,310.08/472,834.56 = 128,194.56/x
  3. Step 3: Cross multiply
    315,310.08x = 472,834.56 × 128,194.56
  4. Step 4: Simplify right side
    315,310.08x = 60,614,818,371.99
  5. Step 5: Solve for x
    x = 60,614,818,371.99/315,310.08
  6. Step 6: Final answer
    x = 192,238.76

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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.