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Finding the Fourth Proportional to 72,629.56, 100,238.88 and 40,800.88

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Solution

The fourth proportional to 72,629.56, 100,238.88 and 40,800.88 is: 56,310.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,629.56 : 100,238.88 = 40,800.88 : x
  2. Step 2: Convert to fraction form
    72,629.56/100,238.88 = 40,800.88/x
  3. Step 3: Cross multiply
    72,629.56x = 100,238.88 × 40,800.88
  4. Step 4: Simplify right side
    72,629.56x = 4,089,834,514.21
  5. Step 5: Solve for x
    x = 4,089,834,514.21/72,629.56
  6. Step 6: Final answer
    x = 56,310.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.