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Finding the Fourth Proportional to 90,986.20, 136,446.90 and 41,090.20

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Solution

The fourth proportional to 90,986.20, 136,446.90 and 41,090.20 is: 61,620.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,986.20 : 136,446.90 = 41,090.20 : x
  2. Step 2: Convert to fraction form
    90,986.20/136,446.90 = 41,090.20/x
  3. Step 3: Cross multiply
    90,986.20x = 136,446.90 × 41,090.20
  4. Step 4: Simplify right side
    90,986.20x = 5,606,630,410.38
  5. Step 5: Solve for x
    x = 5,606,630,410.38/90,986.20
  6. Step 6: Final answer
    x = 61,620.67

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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.