Home / 80,861.60-121,292.40-51,191.30

Finding the Fourth Proportional to 80,861.60, 121,292.40 and 51,191.30

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Solution

The fourth proportional to 80,861.60, 121,292.40 and 51,191.30 is: 76,786.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,861.60 : 121,292.40 = 51,191.30 : x
  2. Step 2: Convert to fraction form
    80,861.60/121,292.40 = 51,191.30/x
  3. Step 3: Cross multiply
    80,861.60x = 121,292.40 × 51,191.30
  4. Step 4: Simplify right side
    80,861.60x = 6,209,115,636.12
  5. Step 5: Solve for x
    x = 6,209,115,636.12/80,861.60
  6. Step 6: Final answer
    x = 76,786.95

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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.