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Finding the Fourth Proportional to 72,940.20, 109,410.30 and 46,674.60

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Solution

The fourth proportional to 72,940.20, 109,410.30 and 46,674.60 is: 70,011.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,940.20 : 109,410.30 = 46,674.60 : x
  2. Step 2: Convert to fraction form
    72,940.20/109,410.30 = 46,674.60/x
  3. Step 3: Cross multiply
    72,940.20x = 109,410.30 × 46,674.60
  4. Step 4: Simplify right side
    72,940.20x = 5,106,681,988.38
  5. Step 5: Solve for x
    x = 5,106,681,988.38/72,940.20
  6. Step 6: Final answer
    x = 70,011.90

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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.