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Finding the Fourth Proportional to 58,540.98, 87,815.25 and 20,585.60

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Solution

The fourth proportional to 58,540.98, 87,815.25 and 20,585.60 is: 30,879.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,540.98 : 87,815.25 = 20,585.60 : x
  2. Step 2: Convert to fraction form
    58,540.98/87,815.25 = 20,585.60/x
  3. Step 3: Cross multiply
    58,540.98x = 87,815.25 × 20,585.60
  4. Step 4: Simplify right side
    58,540.98x = 1,807,729,171.32
  5. Step 5: Solve for x
    x = 1,807,729,171.32/58,540.98
  6. Step 6: Final answer
    x = 30,879.72

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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.