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Finding the Fourth Proportional to 65,791.36, 98,700 and 19,044.64

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Solution

The fourth proportional to 65,791.36, 98,700 and 19,044.64 is: 28,570.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,791.36 : 98,700 = 19,044.64 : x
  2. Step 2: Convert to fraction form
    65,791.36/98,700 = 19,044.64/x
  3. Step 3: Cross multiply
    65,791.36x = 98,700 × 19,044.64
  4. Step 4: Simplify right side
    65,791.36x = 1,879,705,968
  5. Step 5: Solve for x
    x = 1,879,705,968/65,791.36
  6. Step 6: Final answer
    x = 28,570.71

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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.