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Finding the Fourth Proportional to 105,954.48, 158,783.94 and 79,628.40

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Solution

The fourth proportional to 105,954.48, 158,783.94 and 79,628.40 is: 119,331.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,954.48 : 158,783.94 = 79,628.40 : x
  2. Step 2: Convert to fraction form
    105,954.48/158,783.94 = 79,628.40/x
  3. Step 3: Cross multiply
    105,954.48x = 158,783.94 × 79,628.40
  4. Step 4: Simplify right side
    105,954.48x = 12,643,711,087.90
  5. Step 5: Solve for x
    x = 12,643,711,087.90/105,954.48
  6. Step 6: Final answer
    x = 119,331.54

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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.