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Finding the Fourth Proportional to 72,809.96, 100,480.96 and 40,980.92

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Solution

The fourth proportional to 72,809.96, 100,480.96 and 40,980.92 is: 56,555.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,809.96 : 100,480.96 = 40,980.92 : x
  2. Step 2: Convert to fraction form
    72,809.96/100,480.96 = 40,980.92/x
  3. Step 3: Cross multiply
    72,809.96x = 100,480.96 × 40,980.92
  4. Step 4: Simplify right side
    72,809.96x = 4,117,802,183.28
  5. Step 5: Solve for x
    x = 4,117,802,183.28/72,809.96
  6. Step 6: Final answer
    x = 56,555.48

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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.