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Finding the Fourth Proportional to 81,815.40, 122,658.30 and 44,879.40

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Solution

The fourth proportional to 81,815.40, 122,658.30 and 44,879.40 is: 67,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,815.40 : 122,658.30 = 44,879.40 : x
  2. Step 2: Convert to fraction form
    81,815.40/122,658.30 = 44,879.40/x
  3. Step 3: Cross multiply
    81,815.40x = 122,658.30 × 44,879.40
  4. Step 4: Simplify right side
    81,815.40x = 5,504,830,909.02
  5. Step 5: Solve for x
    x = 5,504,830,909.02/81,815.40
  6. Step 6: Final answer
    x = 67,283.55

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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.