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Finding the Fourth Proportional to 81,808.94, 122,588.16 and 55,055.95

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Solution

The fourth proportional to 81,808.94, 122,588.16 and 55,055.95 is: 82,499.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.94 : 122,588.16 = 55,055.95 : x
  2. Step 2: Convert to fraction form
    81,808.94/122,588.16 = 55,055.95/x
  3. Step 3: Cross multiply
    81,808.94x = 122,588.16 × 55,055.95
  4. Step 4: Simplify right side
    81,808.94x = 6,749,206,994.61
  5. Step 5: Solve for x
    x = 6,749,206,994.61/81,808.94
  6. Step 6: Final answer
    x = 82,499.63

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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.