Home / 72,021.70-99,380.78-40,191.94

Finding the Fourth Proportional to 72,021.70, 99,380.78 and 40,191.94

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Solution

The fourth proportional to 72,021.70, 99,380.78 and 40,191.94 is: 55,459.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.70 : 99,380.78 = 40,191.94 : x
  2. Step 2: Convert to fraction form
    72,021.70/99,380.78 = 40,191.94/x
  3. Step 3: Cross multiply
    72,021.70x = 99,380.78 × 40,191.94
  4. Step 4: Simplify right side
    72,021.70x = 3,994,306,145.95
  5. Step 5: Solve for x
    x = 3,994,306,145.95/72,021.70
  6. Step 6: Final answer
    x = 55,459.76

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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.