Home / 72,739.82-100,379.99-40,908.72

Finding the Fourth Proportional to 72,739.82, 100,379.99 and 40,908.72

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Solution

The fourth proportional to 72,739.82, 100,379.99 and 40,908.72 is: 56,453.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,739.82 : 100,379.99 = 40,908.72 : x
  2. Step 2: Convert to fraction form
    72,739.82/100,379.99 = 40,908.72/x
  3. Step 3: Cross multiply
    72,739.82x = 100,379.99 × 40,908.72
  4. Step 4: Simplify right side
    72,739.82x = 4,106,416,699.97
  5. Step 5: Solve for x
    x = 4,106,416,699.97/72,739.82
  6. Step 6: Final answer
    x = 56,453.49

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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.