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Finding the Fourth Proportional to 99,784.20, 149,311.80 and 73,540.20

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Solution

The fourth proportional to 99,784.20, 149,311.80 and 73,540.20 is: 110,041.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,784.20 : 149,311.80 = 73,540.20 : x
  2. Step 2: Convert to fraction form
    99,784.20/149,311.80 = 73,540.20/x
  3. Step 3: Cross multiply
    99,784.20x = 149,311.80 × 73,540.20
  4. Step 4: Simplify right side
    99,784.20x = 10,980,419,634.36
  5. Step 5: Solve for x
    x = 10,980,419,634.36/99,784.20
  6. Step 6: Final answer
    x = 110,041.67

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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.