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Finding the Fourth Proportional to 192,912.30, 289,368.45 and 139,768.20

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Solution

The fourth proportional to 192,912.30, 289,368.45 and 139,768.20 is: 209,652.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,912.30 : 289,368.45 = 139,768.20 : x
  2. Step 2: Convert to fraction form
    192,912.30/289,368.45 = 139,768.20/x
  3. Step 3: Cross multiply
    192,912.30x = 289,368.45 × 139,768.20
  4. Step 4: Simplify right side
    192,912.30x = 40,444,507,393.29
  5. Step 5: Solve for x
    x = 40,444,507,393.29/192,912.30
  6. Step 6: Final answer
    x = 209,652.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.