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Finding the Fourth Proportional to 66,927.70, 100,391.55 and 51,181.30

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Solution

The fourth proportional to 66,927.70, 100,391.55 and 51,181.30 is: 76,771.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,927.70 : 100,391.55 = 51,181.30 : x
  2. Step 2: Convert to fraction form
    66,927.70/100,391.55 = 51,181.30/x
  3. Step 3: Cross multiply
    66,927.70x = 100,391.55 × 51,181.30
  4. Step 4: Simplify right side
    66,927.70x = 5,138,170,038.02
  5. Step 5: Solve for x
    x = 5,138,170,038.02/66,927.70
  6. Step 6: Final answer
    x = 76,771.95

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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.