Home / 81,621.80-122,432.70-56,738.60

Finding the Fourth Proportional to 81,621.80, 122,432.70 and 56,738.60

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Solution

The fourth proportional to 81,621.80, 122,432.70 and 56,738.60 is: 85,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.80 : 122,432.70 = 56,738.60 : x
  2. Step 2: Convert to fraction form
    81,621.80/122,432.70 = 56,738.60/x
  3. Step 3: Cross multiply
    81,621.80x = 122,432.70 × 56,738.60
  4. Step 4: Simplify right side
    81,621.80x = 6,946,659,992.22
  5. Step 5: Solve for x
    x = 6,946,659,992.22/81,621.80
  6. Step 6: Final answer
    x = 85,107.90

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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.