Home / 258,623.70-387,704.70-100,815.45

Finding the Fourth Proportional to 258,623.70, 387,704.70 and 100,815.45

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Solution

The fourth proportional to 258,623.70, 387,704.70 and 100,815.45 is: 151,133.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,623.70 : 387,704.70 = 100,815.45 : x
  2. Step 2: Convert to fraction form
    258,623.70/387,704.70 = 100,815.45/x
  3. Step 3: Cross multiply
    258,623.70x = 387,704.70 × 100,815.45
  4. Step 4: Simplify right side
    258,623.70x = 39,086,623,797.62
  5. Step 5: Solve for x
    x = 39,086,623,797.62/258,623.70
  6. Step 6: Final answer
    x = 151,133.19

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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.