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Finding the Fourth Proportional to 71,999.20, 107,998.80 and 45,733.60

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Solution

The fourth proportional to 71,999.20, 107,998.80 and 45,733.60 is: 68,600.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,999.20 : 107,998.80 = 45,733.60 : x
  2. Step 2: Convert to fraction form
    71,999.20/107,998.80 = 45,733.60/x
  3. Step 3: Cross multiply
    71,999.20x = 107,998.80 × 45,733.60
  4. Step 4: Simplify right side
    71,999.20x = 4,939,173,919.68
  5. Step 5: Solve for x
    x = 4,939,173,919.68/71,999.20
  6. Step 6: Final answer
    x = 68,600.40

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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.