Home / 90,605.06-135,879.90-43,195.16

Finding the Fourth Proportional to 90,605.06, 135,879.90 and 43,195.16

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Solution

The fourth proportional to 90,605.06, 135,879.90 and 43,195.16 is: 64,779.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,605.06 : 135,879.90 = 43,195.16 : x
  2. Step 2: Convert to fraction form
    90,605.06/135,879.90 = 43,195.16/x
  3. Step 3: Cross multiply
    90,605.06x = 135,879.90 × 43,195.16
  4. Step 4: Simplify right side
    90,605.06x = 5,869,354,021.28
  5. Step 5: Solve for x
    x = 5,869,354,021.28/90,605.06
  6. Step 6: Final answer
    x = 64,779.54

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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.