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Finding the Fourth Proportional to 80,698.60, 121,004.70 and 33,898.60

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Solution

The fourth proportional to 80,698.60, 121,004.70 and 33,898.60 is: 50,829.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,698.60 : 121,004.70 = 33,898.60 : x
  2. Step 2: Convert to fraction form
    80,698.60/121,004.70 = 33,898.60/x
  3. Step 3: Cross multiply
    80,698.60x = 121,004.70 × 33,898.60
  4. Step 4: Simplify right side
    80,698.60x = 4,101,889,923.42
  5. Step 5: Solve for x
    x = 4,101,889,923.42/80,698.60
  6. Step 6: Final answer
    x = 50,829.75

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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.