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Finding the Fourth Proportional to 65,506.20, 90,387.29 and 36,821.88

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Solution

The fourth proportional to 65,506.20, 90,387.29 and 36,821.88 is: 50,807.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,506.20 : 90,387.29 = 36,821.88 : x
  2. Step 2: Convert to fraction form
    65,506.20/90,387.29 = 36,821.88/x
  3. Step 3: Cross multiply
    65,506.20x = 90,387.29 × 36,821.88
  4. Step 4: Simplify right side
    65,506.20x = 3,328,229,761.80
  5. Step 5: Solve for x
    x = 3,328,229,761.80/65,506.20
  6. Step 6: Final answer
    x = 50,807.86

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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.