Home / 258,057.09-387,085.64-80,579.31

Finding the Fourth Proportional to 258,057.09, 387,085.64 and 80,579.31

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Solution

The fourth proportional to 258,057.09, 387,085.64 and 80,579.31 is: 120,868.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,057.09 : 387,085.64 = 80,579.31 : x
  2. Step 2: Convert to fraction form
    258,057.09/387,085.64 = 80,579.31/x
  3. Step 3: Cross multiply
    258,057.09x = 387,085.64 × 80,579.31
  4. Step 4: Simplify right side
    258,057.09x = 31,191,091,927.64
  5. Step 5: Solve for x
    x = 31,191,091,927.64/258,057.09
  6. Step 6: Final answer
    x = 120,868.96

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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.