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Finding the Fourth Proportional to 106,412.80, 159,619.20 and 73,235.20

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Solution

The fourth proportional to 106,412.80, 159,619.20 and 73,235.20 is: 109,852.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,412.80 : 159,619.20 = 73,235.20 : x
  2. Step 2: Convert to fraction form
    106,412.80/159,619.20 = 73,235.20/x
  3. Step 3: Cross multiply
    106,412.80x = 159,619.20 × 73,235.20
  4. Step 4: Simplify right side
    106,412.80x = 11,689,744,035.84
  5. Step 5: Solve for x
    x = 11,689,744,035.84/106,412.80
  6. Step 6: Final answer
    x = 109,852.80

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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.