Home / 258,666.46-388,016.07-81,180.48

Finding the Fourth Proportional to 258,666.46, 388,016.07 and 81,180.48

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Solution

The fourth proportional to 258,666.46, 388,016.07 and 81,180.48 is: 121,775.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,666.46 : 388,016.07 = 81,180.48 : x
  2. Step 2: Convert to fraction form
    258,666.46/388,016.07 = 81,180.48/x
  3. Step 3: Cross multiply
    258,666.46x = 388,016.07 × 81,180.48
  4. Step 4: Simplify right side
    258,666.46x = 31,499,330,235.00
  5. Step 5: Solve for x
    x = 31,499,330,235.00/258,666.46
  6. Step 6: Final answer
    x = 121,775.86

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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.