Home / 280,295,571.80-420,368,708.10-86,206,611.80

Finding the Fourth Proportional to 280,295,571.80, 420,368,708.10 and 86,206,611.80

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Solution

The fourth proportional to 280,295,571.80, 420,368,708.10 and 86,206,611.80 is: 129,286,958.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,295,571.80 : 420,368,708.10 = 86,206,611.80 : x
  2. Step 2: Convert to fraction form
    280,295,571.80/420,368,708.10 = 86,206,611.80/x
  3. Step 3: Cross multiply
    280,295,571.80x = 420,368,708.10 × 86,206,611.80
  4. Step 4: Simplify right side
    280,295,571.80x = 36,238,562,032,044,216
  5. Step 5: Solve for x
    x = 36,238,562,032,044,216/280,295,571.80
  6. Step 6: Final answer
    x = 129,286,958.76

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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.