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Finding the Fourth Proportional to 72,968.40, 109,452.60 and 46,724.40

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Solution

The fourth proportional to 72,968.40, 109,452.60 and 46,724.40 is: 70,086.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,968.40 : 109,452.60 = 46,724.40 : x
  2. Step 2: Convert to fraction form
    72,968.40/109,452.60 = 46,724.40/x
  3. Step 3: Cross multiply
    72,968.40x = 109,452.60 × 46,724.40
  4. Step 4: Simplify right side
    72,968.40x = 5,114,107,063.44
  5. Step 5: Solve for x
    x = 5,114,107,063.44/72,968.40
  6. Step 6: Final answer
    x = 70,086.60

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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.