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Finding the Fourth Proportional to 81,055.84, 111,868.80 and 58,469.68

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Solution

The fourth proportional to 81,055.84, 111,868.80 and 58,469.68 is: 80,696.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,055.84 : 111,868.80 = 58,469.68 : x
  2. Step 2: Convert to fraction form
    81,055.84/111,868.80 = 58,469.68/x
  3. Step 3: Cross multiply
    81,055.84x = 111,868.80 × 58,469.68
  4. Step 4: Simplify right side
    81,055.84x = 6,540,932,937.98
  5. Step 5: Solve for x
    x = 6,540,932,937.98/81,055.84
  6. Step 6: Final answer
    x = 80,696.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.