Home / 258,821.12-388,231.56-71,832.56

Finding the Fourth Proportional to 258,821.12, 388,231.56 and 71,832.56

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Solution

The fourth proportional to 258,821.12, 388,231.56 and 71,832.56 is: 107,748.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,821.12 : 388,231.56 = 71,832.56 : x
  2. Step 2: Convert to fraction form
    258,821.12/388,231.56 = 71,832.56/x
  3. Step 3: Cross multiply
    258,821.12x = 388,231.56 × 71,832.56
  4. Step 4: Simplify right side
    258,821.12x = 27,887,666,827.59
  5. Step 5: Solve for x
    x = 27,887,666,827.59/258,821.12
  6. Step 6: Final answer
    x = 107,748.81

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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.