Home / 258,971.80-388,458.60-71,983.12

Finding the Fourth Proportional to 258,971.80, 388,458.60 and 71,983.12

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Solution

The fourth proportional to 258,971.80, 388,458.60 and 71,983.12 is: 107,974.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,971.80 : 388,458.60 = 71,983.12 : x
  2. Step 2: Convert to fraction form
    258,971.80/388,458.60 = 71,983.12/x
  3. Step 3: Cross multiply
    258,971.80x = 388,458.60 × 71,983.12
  4. Step 4: Simplify right side
    258,971.80x = 27,962,462,018.83
  5. Step 5: Solve for x
    x = 27,962,462,018.83/258,971.80
  6. Step 6: Final answer
    x = 107,974.93

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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.