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Finding the Fourth Proportional to 65,907, 90,956.52 and 40,761.36

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Solution

The fourth proportional to 65,907, 90,956.52 and 40,761.36 is: 56,253.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,907 : 90,956.52 = 40,761.36 : x
  2. Step 2: Convert to fraction form
    65,907/90,956.52 = 40,761.36/x
  3. Step 3: Cross multiply
    65,907x = 90,956.52 × 40,761.36
  4. Step 4: Simplify right side
    65,907x = 3,707,511,456.07
  5. Step 5: Solve for x
    x = 3,707,511,456.07/65,907
  6. Step 6: Final answer
    x = 56,253.68

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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.