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Finding the Fourth Proportional to 172,709.55, 259,064.33 and 72,843.23

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Solution

The fourth proportional to 172,709.55, 259,064.33 and 72,843.23 is: 109,264.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,709.55 : 259,064.33 = 72,843.23 : x
  2. Step 2: Convert to fraction form
    172,709.55/259,064.33 = 72,843.23/x
  3. Step 3: Cross multiply
    172,709.55x = 259,064.33 × 72,843.23
  4. Step 4: Simplify right side
    172,709.55x = 18,871,082,858.43
  5. Step 5: Solve for x
    x = 18,871,082,858.43/172,709.55
  6. Step 6: Final answer
    x = 109,264.85

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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.