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Finding the Fourth Proportional to 90,808.12, 136,213.16 and 27,638.48

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Solution

The fourth proportional to 90,808.12, 136,213.16 and 27,638.48 is: 41,458.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,808.12 : 136,213.16 = 27,638.48 : x
  2. Step 2: Convert to fraction form
    90,808.12/136,213.16 = 27,638.48/x
  3. Step 3: Cross multiply
    90,808.12x = 136,213.16 × 27,638.48
  4. Step 4: Simplify right side
    90,808.12x = 3,764,724,698.40
  5. Step 5: Solve for x
    x = 3,764,724,698.40/90,808.12
  6. Step 6: Final answer
    x = 41,458.02

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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.