Home / 258,990.24-388,490.40-71,999.04

Finding the Fourth Proportional to 258,990.24, 388,490.40 and 71,999.04

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Solution

The fourth proportional to 258,990.24, 388,490.40 and 71,999.04 is: 107,999.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,990.24 : 388,490.40 = 71,999.04 : x
  2. Step 2: Convert to fraction form
    258,990.24/388,490.40 = 71,999.04/x
  3. Step 3: Cross multiply
    258,990.24x = 388,490.40 × 71,999.04
  4. Step 4: Simplify right side
    258,990.24x = 27,970,935,849.22
  5. Step 5: Solve for x
    x = 27,970,935,849.22/258,990.24
  6. Step 6: Final answer
    x = 107,999.96

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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.