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Finding the Fourth Proportional to 121,896.86, 168,260.03 and 83,782.85

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Solution

The fourth proportional to 121,896.86, 168,260.03 and 83,782.85 is: 115,649.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,896.86 : 168,260.03 = 83,782.85 : x
  2. Step 2: Convert to fraction form
    121,896.86/168,260.03 = 83,782.85/x
  3. Step 3: Cross multiply
    121,896.86x = 168,260.03 × 83,782.85
  4. Step 4: Simplify right side
    121,896.86x = 14,097,303,594.27
  5. Step 5: Solve for x
    x = 14,097,303,594.27/121,896.86
  6. Step 6: Final answer
    x = 115,649.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.