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Finding the Fourth Proportional to 73,089.21, 100,863.09 and 39,555.21

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Solution

The fourth proportional to 73,089.21, 100,863.09 and 39,555.21 is: 54,586.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,089.21 : 100,863.09 = 39,555.21 : x
  2. Step 2: Convert to fraction form
    73,089.21/100,863.09 = 39,555.21/x
  3. Step 3: Cross multiply
    73,089.21x = 100,863.09 × 39,555.21
  4. Step 4: Simplify right side
    73,089.21x = 3,989,660,706.20
  5. Step 5: Solve for x
    x = 3,989,660,706.20/73,089.21
  6. Step 6: Final answer
    x = 54,586.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.