Home / 81,379.38-122,068.16-28,776.56

Finding the Fourth Proportional to 81,379.38, 122,068.16 and 28,776.56

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Solution

The fourth proportional to 81,379.38, 122,068.16 and 28,776.56 is: 43,164.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,379.38 : 122,068.16 = 28,776.56 : x
  2. Step 2: Convert to fraction form
    81,379.38/122,068.16 = 28,776.56/x
  3. Step 3: Cross multiply
    81,379.38x = 122,068.16 × 28,776.56
  4. Step 4: Simplify right side
    81,379.38x = 3,512,701,586.45
  5. Step 5: Solve for x
    x = 3,512,701,586.45/81,379.38
  6. Step 6: Final answer
    x = 43,164.52

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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.