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Finding the Fourth Proportional to 139,698.86, 192,784.39 and 76,037.09

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Solution

The fourth proportional to 139,698.86, 192,784.39 and 76,037.09 is: 104,931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,698.86 : 192,784.39 = 76,037.09 : x
  2. Step 2: Convert to fraction form
    139,698.86/192,784.39 = 76,037.09/x
  3. Step 3: Cross multiply
    139,698.86x = 192,784.39 × 76,037.09
  4. Step 4: Simplify right side
    139,698.86x = 14,658,762,859.01
  5. Step 5: Solve for x
    x = 14,658,762,859.01/139,698.86
  6. Step 6: Final answer
    x = 104,931.16

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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.