Home / 72,021.35-99,377.58-40,190.18

Finding the Fourth Proportional to 72,021.35, 99,377.58 and 40,190.18

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Solution

The fourth proportional to 72,021.35, 99,377.58 and 40,190.18 is: 55,455.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.35 : 99,377.58 = 40,190.18 : x
  2. Step 2: Convert to fraction form
    72,021.35/99,377.58 = 40,190.18/x
  3. Step 3: Cross multiply
    72,021.35x = 99,377.58 × 40,190.18
  4. Step 4: Simplify right side
    72,021.35x = 3,994,002,481.99
  5. Step 5: Solve for x
    x = 3,994,002,481.99/72,021.35
  6. Step 6: Final answer
    x = 55,455.81

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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.