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Finding the Fourth Proportional to 55,131.64, 76,098.79 and 43,821.20

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Solution

The fourth proportional to 55,131.64, 76,098.79 and 43,821.20 is: 60,486.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,131.64 : 76,098.79 = 43,821.20 : x
  2. Step 2: Convert to fraction form
    55,131.64/76,098.79 = 43,821.20/x
  3. Step 3: Cross multiply
    55,131.64x = 76,098.79 × 43,821.20
  4. Step 4: Simplify right side
    55,131.64x = 3,334,740,541.37
  5. Step 5: Solve for x
    x = 3,334,740,541.37/55,131.64
  6. Step 6: Final answer
    x = 60,486.88

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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.