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Finding the Fourth Proportional to 53,865.90, 80,802.36 and 43,983.90

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Solution

The fourth proportional to 53,865.90, 80,802.36 and 43,983.90 is: 65,978.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,865.90 : 80,802.36 = 43,983.90 : x
  2. Step 2: Convert to fraction form
    53,865.90/80,802.36 = 43,983.90/x
  3. Step 3: Cross multiply
    53,865.90x = 80,802.36 × 43,983.90
  4. Step 4: Simplify right side
    53,865.90x = 3,554,002,922.00
  5. Step 5: Solve for x
    x = 3,554,002,922.00/53,865.90
  6. Step 6: Final answer
    x = 65,978.72

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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.