Home / 72,021.44-99,378.24-40,188.80

Finding the Fourth Proportional to 72,021.44, 99,378.24 and 40,188.80

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Solution

The fourth proportional to 72,021.44, 99,378.24 and 40,188.80 is: 55,454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.44 : 99,378.24 = 40,188.80 : x
  2. Step 2: Convert to fraction form
    72,021.44/99,378.24 = 40,188.80/x
  3. Step 3: Cross multiply
    72,021.44x = 99,378.24 × 40,188.80
  4. Step 4: Simplify right side
    72,021.44x = 3,993,892,211.71
  5. Step 5: Solve for x
    x = 3,993,892,211.71/72,021.44
  6. Step 6: Final answer
    x = 55,454.21

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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.