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Finding the Fourth Proportional to 57,387.96, 79,190.64 and 31,889.88

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Solution

The fourth proportional to 57,387.96, 79,190.64 and 31,889.88 is: 44,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,387.96 : 79,190.64 = 31,889.88 : x
  2. Step 2: Convert to fraction form
    57,387.96/79,190.64 = 31,889.88/x
  3. Step 3: Cross multiply
    57,387.96x = 79,190.64 × 31,889.88
  4. Step 4: Simplify right side
    57,387.96x = 2,525,380,006.72
  5. Step 5: Solve for x
    x = 2,525,380,006.72/57,387.96
  6. Step 6: Final answer
    x = 44,005.40

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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.