Home / 85,976.05-128,982.30-25,999.60

Finding the Fourth Proportional to 85,976.05, 128,982.30 and 25,999.60

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Solution

The fourth proportional to 85,976.05, 128,982.30 and 25,999.60 is: 39,004.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,976.05 : 128,982.30 = 25,999.60 : x
  2. Step 2: Convert to fraction form
    85,976.05/128,982.30 = 25,999.60/x
  3. Step 3: Cross multiply
    85,976.05x = 128,982.30 × 25,999.60
  4. Step 4: Simplify right side
    85,976.05x = 3,353,488,207.08
  5. Step 5: Solve for x
    x = 3,353,488,207.08/85,976.05
  6. Step 6: Final answer
    x = 39,004.91

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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.