Home / 85,646.21-128,469.33-26,480.57

Finding the Fourth Proportional to 85,646.21, 128,469.33 and 26,480.57

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Solution

The fourth proportional to 85,646.21, 128,469.33 and 26,480.57 is: 39,720.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,646.21 : 128,469.33 = 26,480.57 : x
  2. Step 2: Convert to fraction form
    85,646.21/128,469.33 = 26,480.57/x
  3. Step 3: Cross multiply
    85,646.21x = 128,469.33 × 26,480.57
  4. Step 4: Simplify right side
    85,646.21x = 3,401,940,443.57
  5. Step 5: Solve for x
    x = 3,401,940,443.57/85,646.21
  6. Step 6: Final answer
    x = 39,720.85

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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.