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Finding the Fourth Proportional to 73,809.72, 110,715 and 18,405.72

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Solution

The fourth proportional to 73,809.72, 110,715 and 18,405.72 is: 27,608.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,809.72 : 110,715 = 18,405.72 : x
  2. Step 2: Convert to fraction form
    73,809.72/110,715 = 18,405.72/x
  3. Step 3: Cross multiply
    73,809.72x = 110,715 × 18,405.72
  4. Step 4: Simplify right side
    73,809.72x = 2,037,789,289.80
  5. Step 5: Solve for x
    x = 2,037,789,289.80/73,809.72
  6. Step 6: Final answer
    x = 27,608.68

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1.5x scale

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.