Home / 80,861.10-121,291.65-51,190.80

Finding the Fourth Proportional to 80,861.10, 121,291.65 and 51,190.80

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Solution

The fourth proportional to 80,861.10, 121,291.65 and 51,190.80 is: 76,786.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861.10 : 121,291.65 = 51,190.80 : x
  2. Step 2: Convert to fraction form
    80,861.10/121,291.65 = 51,190.80/x
  3. Step 3: Cross multiply
    80,861.10x = 121,291.65 × 51,190.80
  4. Step 4: Simplify right side
    80,861.10x = 6,209,016,596.82
  5. Step 5: Solve for x
    x = 6,209,016,596.82/80,861.10
  6. Step 6: Final answer
    x = 76,786.20

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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.