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Finding the Fourth Proportional to 57,761.88, 86,653.64 and 18,308.40

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Solution

The fourth proportional to 57,761.88, 86,653.64 and 18,308.40 is: 27,466.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,761.88 : 86,653.64 = 18,308.40 : x
  2. Step 2: Convert to fraction form
    57,761.88/86,653.64 = 18,308.40/x
  3. Step 3: Cross multiply
    57,761.88x = 86,653.64 × 18,308.40
  4. Step 4: Simplify right side
    57,761.88x = 1,586,489,502.58
  5. Step 5: Solve for x
    x = 1,586,489,502.58/57,761.88
  6. Step 6: Final answer
    x = 27,466.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.