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Finding the Fourth Proportional to 58,082.70, 87,135.38 and 18,636.78

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Solution

The fourth proportional to 58,082.70, 87,135.38 and 18,636.78 is: 27,958.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,082.70 : 87,135.38 = 18,636.78 : x
  2. Step 2: Convert to fraction form
    58,082.70/87,135.38 = 18,636.78/x
  3. Step 3: Cross multiply
    58,082.70x = 87,135.38 × 18,636.78
  4. Step 4: Simplify right side
    58,082.70x = 1,623,922,907.28
  5. Step 5: Solve for x
    x = 1,623,922,907.28/58,082.70
  6. Step 6: Final answer
    x = 27,958.81

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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.