Home / 81,427.20-122,140.80-53,433.60

Finding the Fourth Proportional to 81,427.20, 122,140.80 and 53,433.60

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Solution

The fourth proportional to 81,427.20, 122,140.80 and 53,433.60 is: 80,150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,427.20 : 122,140.80 = 53,433.60 : x
  2. Step 2: Convert to fraction form
    81,427.20/122,140.80 = 53,433.60/x
  3. Step 3: Cross multiply
    81,427.20x = 122,140.80 × 53,433.60
  4. Step 4: Simplify right side
    81,427.20x = 6,526,422,650.88
  5. Step 5: Solve for x
    x = 6,526,422,650.88/81,427.20
  6. Step 6: Final answer
    x = 80,150.40

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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.