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Finding the Fourth Proportional to 67,226.88, 100,840.32 and 20,479.75

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Solution

The fourth proportional to 67,226.88, 100,840.32 and 20,479.75 is: 30,719.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,226.88 : 100,840.32 = 20,479.75 : x
  2. Step 2: Convert to fraction form
    67,226.88/100,840.32 = 20,479.75/x
  3. Step 3: Cross multiply
    67,226.88x = 100,840.32 × 20,479.75
  4. Step 4: Simplify right side
    67,226.88x = 2,065,184,543.52
  5. Step 5: Solve for x
    x = 2,065,184,543.52/67,226.88
  6. Step 6: Final answer
    x = 30,719.63

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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.