Home / 205,865.40-308,826.90-87,535.80

Finding the Fourth Proportional to 205,865.40, 308,826.90 and 87,535.80

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Solution

The fourth proportional to 205,865.40, 308,826.90 and 87,535.80 is: 131,315.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,865.40 : 308,826.90 = 87,535.80 : x
  2. Step 2: Convert to fraction form
    205,865.40/308,826.90 = 87,535.80/x
  3. Step 3: Cross multiply
    205,865.40x = 308,826.90 × 87,535.80
  4. Step 4: Simplify right side
    205,865.40x = 27,033,409,753.02
  5. Step 5: Solve for x
    x = 27,033,409,753.02/205,865.40
  6. Step 6: Final answer
    x = 131,315.95

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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.