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Finding the Fourth Proportional to 70,758.20, 106,137.58 and 67,210.80

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Solution

The fourth proportional to 70,758.20, 106,137.58 and 67,210.80 is: 100,816.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,758.20 : 106,137.58 = 67,210.80 : x
  2. Step 2: Convert to fraction form
    70,758.20/106,137.58 = 67,210.80/x
  3. Step 3: Cross multiply
    70,758.20x = 106,137.58 × 67,210.80
  4. Step 4: Simplify right side
    70,758.20x = 7,133,591,661.86
  5. Step 5: Solve for x
    x = 7,133,591,661.86/70,758.20
  6. Step 6: Final answer
    x = 100,816.47

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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.