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Finding the Fourth Proportional to 65,786.88, 90,755.52 and 40,285.44

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Solution

The fourth proportional to 65,786.88, 90,755.52 and 40,285.44 is: 55,575.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,786.88 : 90,755.52 = 40,285.44 : x
  2. Step 2: Convert to fraction form
    65,786.88/90,755.52 = 40,285.44/x
  3. Step 3: Cross multiply
    65,786.88x = 90,755.52 × 40,285.44
  4. Step 4: Simplify right side
    65,786.88x = 3,656,126,055.63
  5. Step 5: Solve for x
    x = 3,656,126,055.63/65,786.88
  6. Step 6: Final answer
    x = 55,575.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.