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Finding the Fourth Proportional to 92,917.80, 128,212.20 and 54,696.60

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Solution

The fourth proportional to 92,917.80, 128,212.20 and 54,696.60 is: 75,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,917.80 : 128,212.20 = 54,696.60 : x
  2. Step 2: Convert to fraction form
    92,917.80/128,212.20 = 54,696.60/x
  3. Step 3: Cross multiply
    92,917.80x = 128,212.20 × 54,696.60
  4. Step 4: Simplify right side
    92,917.80x = 7,012,771,418.52
  5. Step 5: Solve for x
    x = 7,012,771,418.52/92,917.80
  6. Step 6: Final answer
    x = 75,472.85

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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.