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Finding the Fourth Proportional to 258,469.23, 387,704.07 and 80,990.08

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Solution

The fourth proportional to 258,469.23, 387,704.07 and 80,990.08 is: 121,485.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,469.23 : 387,704.07 = 80,990.08 : x
  2. Step 2: Convert to fraction form
    258,469.23/387,704.07 = 80,990.08/x
  3. Step 3: Cross multiply
    258,469.23x = 387,704.07 × 80,990.08
  4. Step 4: Simplify right side
    258,469.23x = 31,400,182,676.37
  5. Step 5: Solve for x
    x = 31,400,182,676.37/258,469.23
  6. Step 6: Final answer
    x = 121,485.19

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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.