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Finding the Fourth Proportional to 57,721.67, 86,576.82 and 28,159.91

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Solution

The fourth proportional to 57,721.67, 86,576.82 and 28,159.91 is: 42,237.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,721.67 : 86,576.82 = 28,159.91 : x
  2. Step 2: Convert to fraction form
    57,721.67/86,576.82 = 28,159.91/x
  3. Step 3: Cross multiply
    57,721.67x = 86,576.82 × 28,159.91
  4. Step 4: Simplify right side
    57,721.67x = 2,437,995,459.29
  5. Step 5: Solve for x
    x = 2,437,995,459.29/57,721.67
  6. Step 6: Final answer
    x = 42,237.09

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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.