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Finding the Fourth Proportional to 70,638.80, 106,015.80 and 68,334.80

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Solution

The fourth proportional to 70,638.80, 106,015.80 and 68,334.80 is: 102,557.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,638.80 : 106,015.80 = 68,334.80 : x
  2. Step 2: Convert to fraction form
    70,638.80/106,015.80 = 68,334.80/x
  3. Step 3: Cross multiply
    70,638.80x = 106,015.80 × 68,334.80
  4. Step 4: Simplify right side
    70,638.80x = 7,244,568,489.84
  5. Step 5: Solve for x
    x = 7,244,568,489.84/70,638.80
  6. Step 6: Final answer
    x = 102,557.92

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1.5x scale

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.