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Finding the Fourth Proportional to 100,555.56, 138,813.84 and 58,105.80

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Solution

The fourth proportional to 100,555.56, 138,813.84 and 58,105.80 is: 80,213.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,555.56 : 138,813.84 = 58,105.80 : x
  2. Step 2: Convert to fraction form
    100,555.56/138,813.84 = 58,105.80/x
  3. Step 3: Cross multiply
    100,555.56x = 138,813.84 × 58,105.80
  4. Step 4: Simplify right side
    100,555.56x = 8,065,889,224.27
  5. Step 5: Solve for x
    x = 8,065,889,224.27/100,555.56
  6. Step 6: Final answer
    x = 80,213.26

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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.