Home / 85,039.20-127,553.40-28,879.20

Finding the Fourth Proportional to 85,039.20, 127,553.40 and 28,879.20

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Solution

The fourth proportional to 85,039.20, 127,553.40 and 28,879.20 is: 43,316.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,039.20 : 127,553.40 = 28,879.20 : x
  2. Step 2: Convert to fraction form
    85,039.20/127,553.40 = 28,879.20/x
  3. Step 3: Cross multiply
    85,039.20x = 127,553.40 × 28,879.20
  4. Step 4: Simplify right side
    85,039.20x = 3,683,640,149.28
  5. Step 5: Solve for x
    x = 3,683,640,149.28/85,039.20
  6. Step 6: Final answer
    x = 43,316.97

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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.