Home / 82,129.05-122,599.53-72,164.55

Finding the Fourth Proportional to 82,129.05, 122,599.53 and 72,164.55

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Solution

The fourth proportional to 82,129.05, 122,599.53 and 72,164.55 is: 107,724.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,129.05 : 122,599.53 = 72,164.55 : x
  2. Step 2: Convert to fraction form
    82,129.05/122,599.53 = 72,164.55/x
  3. Step 3: Cross multiply
    82,129.05x = 122,599.53 × 72,164.55
  4. Step 4: Simplify right side
    82,129.05x = 8,847,339,912.66
  5. Step 5: Solve for x
    x = 8,847,339,912.66/82,129.05
  6. Step 6: Final answer
    x = 107,724.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.