Home / 258,711.77-388,069.38-90,231.47

Finding the Fourth Proportional to 258,711.77, 388,069.38 and 90,231.47

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Solution

The fourth proportional to 258,711.77, 388,069.38 and 90,231.47 is: 135,347.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,711.77 : 388,069.38 = 90,231.47 : x
  2. Step 2: Convert to fraction form
    258,711.77/388,069.38 = 90,231.47/x
  3. Step 3: Cross multiply
    258,711.77x = 388,069.38 × 90,231.47
  4. Step 4: Simplify right side
    258,711.77x = 35,016,070,134.30
  5. Step 5: Solve for x
    x = 35,016,070,134.30/258,711.77
  6. Step 6: Final answer
    x = 135,347.80

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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.