Home / 133,039.30-199,558.95-80,421.70

Finding the Fourth Proportional to 133,039.30, 199,558.95 and 80,421.70

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Solution

The fourth proportional to 133,039.30, 199,558.95 and 80,421.70 is: 120,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,039.30 : 199,558.95 = 80,421.70 : x
  2. Step 2: Convert to fraction form
    133,039.30/199,558.95 = 80,421.70/x
  3. Step 3: Cross multiply
    133,039.30x = 199,558.95 × 80,421.70
  4. Step 4: Simplify right side
    133,039.30x = 16,048,870,009.22
  5. Step 5: Solve for x
    x = 16,048,870,009.22/133,039.30
  6. Step 6: Final answer
    x = 120,632.55

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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.