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Finding the Fourth Proportional to 73,112.80, 109,474.80 and 46,674.40

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Solution

The fourth proportional to 73,112.80, 109,474.80 and 46,674.40 is: 69,887.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,112.80 : 109,474.80 = 46,674.40 : x
  2. Step 2: Convert to fraction form
    73,112.80/109,474.80 = 46,674.40/x
  3. Step 3: Cross multiply
    73,112.80x = 109,474.80 × 46,674.40
  4. Step 4: Simplify right side
    73,112.80x = 5,109,670,605.12
  5. Step 5: Solve for x
    x = 5,109,670,605.12/73,112.80
  6. Step 6: Final answer
    x = 69,887.50

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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.