Home / 72,220.89-108,331.68-18,912.77

Finding the Fourth Proportional to 72,220.89, 108,331.68 and 18,912.77

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Solution

The fourth proportional to 72,220.89, 108,331.68 and 18,912.77 is: 28,369.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.89 : 108,331.68 = 18,912.77 : x
  2. Step 2: Convert to fraction form
    72,220.89/108,331.68 = 18,912.77/x
  3. Step 3: Cross multiply
    72,220.89x = 108,331.68 × 18,912.77
  4. Step 4: Simplify right side
    72,220.89x = 2,048,851,671.99
  5. Step 5: Solve for x
    x = 2,048,851,671.99/72,220.89
  6. Step 6: Final answer
    x = 28,369.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.