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Finding the Fourth Proportional to 85,596.40, 128,151.60 and 80,941.60

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Solution

The fourth proportional to 85,596.40, 128,151.60 and 80,941.60 is: 121,182.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,596.40 : 128,151.60 = 80,941.60 : x
  2. Step 2: Convert to fraction form
    85,596.40/128,151.60 = 80,941.60/x
  3. Step 3: Cross multiply
    85,596.40x = 128,151.60 × 80,941.60
  4. Step 4: Simplify right side
    85,596.40x = 10,372,795,546.56
  5. Step 5: Solve for x
    x = 10,372,795,546.56/85,596.40
  6. Step 6: Final answer
    x = 121,182.61

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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.