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Finding the Fourth Proportional to 139,666.28, 192,739.11 and 76,004.06

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Solution

The fourth proportional to 139,666.28, 192,739.11 and 76,004.06 is: 104,885.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,666.28 : 192,739.11 = 76,004.06 : x
  2. Step 2: Convert to fraction form
    139,666.28/192,739.11 = 76,004.06/x
  3. Step 3: Cross multiply
    139,666.28x = 192,739.11 × 76,004.06
  4. Step 4: Simplify right side
    139,666.28x = 14,648,954,880.79
  5. Step 5: Solve for x
    x = 14,648,954,880.79/139,666.28
  6. Step 6: Final answer
    x = 104,885.41

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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.