Home / 205,826.40-308,608.20-87,436.80

Finding the Fourth Proportional to 205,826.40, 308,608.20 and 87,436.80

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Solution

The fourth proportional to 205,826.40, 308,608.20 and 87,436.80 is: 131,099.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,826.40 : 308,608.20 = 87,436.80 : x
  2. Step 2: Convert to fraction form
    205,826.40/308,608.20 = 87,436.80/x
  3. Step 3: Cross multiply
    205,826.40x = 308,608.20 × 87,436.80
  4. Step 4: Simplify right side
    205,826.40x = 26,983,713,461.76
  5. Step 5: Solve for x
    x = 26,983,713,461.76/205,826.40
  6. Step 6: Final answer
    x = 131,099.38

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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.