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Finding the Fourth Proportional to 58,272.89, 87,387.30 and 18,819.41

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Solution

The fourth proportional to 58,272.89, 87,387.30 and 18,819.41 is: 28,221.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,272.89 : 87,387.30 = 18,819.41 : x
  2. Step 2: Convert to fraction form
    58,272.89/87,387.30 = 18,819.41/x
  3. Step 3: Cross multiply
    58,272.89x = 87,387.30 × 18,819.41
  4. Step 4: Simplify right side
    58,272.89x = 1,644,576,990.56
  5. Step 5: Solve for x
    x = 1,644,576,990.56/58,272.89
  6. Step 6: Final answer
    x = 28,221.99

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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.