Home / 205,556.89-308,338.75-72,438.76

Finding the Fourth Proportional to 205,556.89, 308,338.75 and 72,438.76

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Solution

The fourth proportional to 205,556.89, 308,338.75 and 72,438.76 is: 108,659.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,556.89 : 308,338.75 = 72,438.76 : x
  2. Step 2: Convert to fraction form
    205,556.89/308,338.75 = 72,438.76/x
  3. Step 3: Cross multiply
    205,556.89x = 308,338.75 × 72,438.76
  4. Step 4: Simplify right side
    205,556.89x = 22,335,676,709.95
  5. Step 5: Solve for x
    x = 22,335,676,709.95/205,556.89
  6. Step 6: Final answer
    x = 108,659.34

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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.