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Finding the Fourth Proportional to 139,504.89, 192,508.14 and 78,247.71

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Solution

The fourth proportional to 139,504.89, 192,508.14 and 78,247.71 is: 107,977.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,504.89 : 192,508.14 = 78,247.71 : x
  2. Step 2: Convert to fraction form
    139,504.89/192,508.14 = 78,247.71/x
  3. Step 3: Cross multiply
    139,504.89x = 192,508.14 × 78,247.71
  4. Step 4: Simplify right side
    139,504.89x = 15,063,319,757.58
  5. Step 5: Solve for x
    x = 15,063,319,757.58/139,504.89
  6. Step 6: Final answer
    x = 107,977.00

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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.