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Finding the Fourth Proportional to 51,290.40, 76,984.20 and 43,903.20

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Solution

The fourth proportional to 51,290.40, 76,984.20 and 43,903.20 is: 65,896.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,290.40 : 76,984.20 = 43,903.20 : x
  2. Step 2: Convert to fraction form
    51,290.40/76,984.20 = 43,903.20/x
  3. Step 3: Cross multiply
    51,290.40x = 76,984.20 × 43,903.20
  4. Step 4: Simplify right side
    51,290.40x = 3,379,852,729.44
  5. Step 5: Solve for x
    x = 3,379,852,729.44/51,290.40
  6. Step 6: Final answer
    x = 65,896.40

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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.