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Finding the Fourth Proportional to 55,855.56, 76,990.68 and 45,766.20

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Solution

The fourth proportional to 55,855.56, 76,990.68 and 45,766.20 is: 63,083.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,855.56 : 76,990.68 = 45,766.20 : x
  2. Step 2: Convert to fraction form
    55,855.56/76,990.68 = 45,766.20/x
  3. Step 3: Cross multiply
    55,855.56x = 76,990.68 × 45,766.20
  4. Step 4: Simplify right side
    55,855.56x = 3,523,570,859.02
  5. Step 5: Solve for x
    x = 3,523,570,859.02/55,855.56
  6. Step 6: Final answer
    x = 63,083.62

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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.