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Finding the Fourth Proportional to 72,745.44, 109,106.01 and 20,160.24

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Solution

The fourth proportional to 72,745.44, 109,106.01 and 20,160.24 is: 30,236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,745.44 : 109,106.01 = 20,160.24 : x
  2. Step 2: Convert to fraction form
    72,745.44/109,106.01 = 20,160.24/x
  3. Step 3: Cross multiply
    72,745.44x = 109,106.01 × 20,160.24
  4. Step 4: Simplify right side
    72,745.44x = 2,199,603,347.04
  5. Step 5: Solve for x
    x = 2,199,603,347.04/72,745.44
  6. Step 6: Final answer
    x = 30,236.99

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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.