Home / 258,027.68-387,085.32-80,530.76

Finding the Fourth Proportional to 258,027.68, 387,085.32 and 80,530.76

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Solution

The fourth proportional to 258,027.68, 387,085.32 and 80,530.76 is: 120,809.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,027.68 : 387,085.32 = 80,530.76 : x
  2. Step 2: Convert to fraction form
    258,027.68/387,085.32 = 80,530.76/x
  3. Step 3: Cross multiply
    258,027.68x = 387,085.32 × 80,530.76
  4. Step 4: Simplify right side
    258,027.68x = 31,172,275,004.44
  5. Step 5: Solve for x
    x = 31,172,275,004.44/258,027.68
  6. Step 6: Final answer
    x = 120,809.81

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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.