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Finding the Fourth Proportional to 58,092.70, 87,121.60 and 20,647.85

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Solution

The fourth proportional to 58,092.70, 87,121.60 and 20,647.85 is: 30,965.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,092.70 : 87,121.60 = 20,647.85 : x
  2. Step 2: Convert to fraction form
    58,092.70/87,121.60 = 20,647.85/x
  3. Step 3: Cross multiply
    58,092.70x = 87,121.60 × 20,647.85
  4. Step 4: Simplify right side
    58,092.70x = 1,798,873,728.56
  5. Step 5: Solve for x
    x = 1,798,873,728.56/58,092.70
  6. Step 6: Final answer
    x = 30,965.57

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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.