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Finding the Fourth Proportional to 139,847.01, 192,994.77 and 76,188.30

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Solution

The fourth proportional to 139,847.01, 192,994.77 and 76,188.30 is: 105,143.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,847.01 : 192,994.77 = 76,188.30 : x
  2. Step 2: Convert to fraction form
    139,847.01/192,994.77 = 76,188.30/x
  3. Step 3: Cross multiply
    139,847.01x = 192,994.77 × 76,188.30
  4. Step 4: Simplify right side
    139,847.01x = 14,703,943,435.19
  5. Step 5: Solve for x
    x = 14,703,943,435.19/139,847.01
  6. Step 6: Final answer
    x = 105,143.07

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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.