Home / 81,795.20-122,865.60-78,857.60

Finding the Fourth Proportional to 81,795.20, 122,865.60 and 78,857.60

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Solution

The fourth proportional to 81,795.20, 122,865.60 and 78,857.60 is: 118,452.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,795.20 : 122,865.60 = 78,857.60 : x
  2. Step 2: Convert to fraction form
    81,795.20/122,865.60 = 78,857.60/x
  3. Step 3: Cross multiply
    81,795.20x = 122,865.60 × 78,857.60
  4. Step 4: Simplify right side
    81,795.20x = 9,688,886,338.56
  5. Step 5: Solve for x
    x = 9,688,886,338.56/81,795.20
  6. Step 6: Final answer
    x = 118,452.99

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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.