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Finding the Fourth Proportional to 70,648.80, 105,800.40 and 33,669.60

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Solution

The fourth proportional to 70,648.80, 105,800.40 and 33,669.60 is: 50,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,648.80 : 105,800.40 = 33,669.60 : x
  2. Step 2: Convert to fraction form
    70,648.80/105,800.40 = 33,669.60/x
  3. Step 3: Cross multiply
    70,648.80x = 105,800.40 × 33,669.60
  4. Step 4: Simplify right side
    70,648.80x = 3,562,257,147.84
  5. Step 5: Solve for x
    x = 3,562,257,147.84/70,648.80
  6. Step 6: Final answer
    x = 50,422.05

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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.