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Finding the Fourth Proportional to 86,205,811.20, 129,308,716.80 and 82,804,588.80

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Solution

The fourth proportional to 86,205,811.20, 129,308,716.80 and 82,804,588.80 is: 124,206,883.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,205,811.20 : 129,308,716.80 = 82,804,588.80 : x
  2. Step 2: Convert to fraction form
    86,205,811.20/129,308,716.80 = 82,804,588.80/x
  3. Step 3: Cross multiply
    86,205,811.20x = 129,308,716.80 × 82,804,588.80
  4. Step 4: Simplify right side
    86,205,811.20x = 10,707,355,122,879,652
  5. Step 5: Solve for x
    x = 10,707,355,122,879,652/86,205,811.20
  6. Step 6: Final answer
    x = 124,206,883.20

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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.