Home / 205,990.31-308,735.95-87,412.55

Finding the Fourth Proportional to 205,990.31, 308,735.95 and 87,412.55

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Solution

The fourth proportional to 205,990.31, 308,735.95 and 87,412.55 is: 131,012.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,990.31 : 308,735.95 = 87,412.55 : x
  2. Step 2: Convert to fraction form
    205,990.31/308,735.95 = 87,412.55/x
  3. Step 3: Cross multiply
    205,990.31x = 308,735.95 × 87,412.55
  4. Step 4: Simplify right side
    205,990.31x = 26,987,396,666.17
  5. Step 5: Solve for x
    x = 26,987,396,666.17/205,990.31
  6. Step 6: Final answer
    x = 131,012.94

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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.