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Finding the Fourth Proportional to 51,292.40, 76,987.20 and 43,905.20

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Solution

The fourth proportional to 51,292.40, 76,987.20 and 43,905.20 is: 65,899.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,292.40 : 76,987.20 = 43,905.20 : x
  2. Step 2: Convert to fraction form
    51,292.40/76,987.20 = 43,905.20/x
  3. Step 3: Cross multiply
    51,292.40x = 76,987.20 × 43,905.20
  4. Step 4: Simplify right side
    51,292.40x = 3,380,138,413.44
  5. Step 5: Solve for x
    x = 3,380,138,413.44/51,292.40
  6. Step 6: Final answer
    x = 65,899.40

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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.