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Finding the Fourth Proportional to 58,086.36, 87,138.36 and 20,658.60

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Solution

The fourth proportional to 58,086.36, 87,138.36 and 20,658.60 is: 30,991.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,086.36 : 87,138.36 = 20,658.60 : x
  2. Step 2: Convert to fraction form
    58,086.36/87,138.36 = 20,658.60/x
  3. Step 3: Cross multiply
    58,086.36x = 87,138.36 × 20,658.60
  4. Step 4: Simplify right side
    58,086.36x = 1,800,156,523.90
  5. Step 5: Solve for x
    x = 1,800,156,523.90/58,086.36
  6. Step 6: Final answer
    x = 30,991.04

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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.