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Finding the Fourth Proportional to 57,231.36, 78,939.36 and 55,304.64

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Solution

The fourth proportional to 57,231.36, 78,939.36 and 55,304.64 is: 76,281.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,231.36 : 78,939.36 = 55,304.64 : x
  2. Step 2: Convert to fraction form
    57,231.36/78,939.36 = 55,304.64/x
  3. Step 3: Cross multiply
    57,231.36x = 78,939.36 × 55,304.64
  4. Step 4: Simplify right side
    57,231.36x = 4,365,712,886.63
  5. Step 5: Solve for x
    x = 4,365,712,886.63/57,231.36
  6. Step 6: Final answer
    x = 76,281.83

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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.