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Finding the Fourth Proportional to 58,122.78, 87,172.68 and 15,991.98

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Solution

The fourth proportional to 58,122.78, 87,172.68 and 15,991.98 is: 23,984.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,122.78 : 87,172.68 = 15,991.98 : x
  2. Step 2: Convert to fraction form
    58,122.78/87,172.68 = 15,991.98/x
  3. Step 3: Cross multiply
    58,122.78x = 87,172.68 × 15,991.98
  4. Step 4: Simplify right side
    58,122.78x = 1,394,063,755.11
  5. Step 5: Solve for x
    x = 1,394,063,755.11/58,122.78
  6. Step 6: Final answer
    x = 23,984.81

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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.