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Finding the Fourth Proportional to 100,550.88, 138,754.08 and 55,220.04

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Solution

The fourth proportional to 100,550.88, 138,754.08 and 55,220.04 is: 76,200.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,550.88 : 138,754.08 = 55,220.04 : x
  2. Step 2: Convert to fraction form
    100,550.88/138,754.08 = 55,220.04/x
  3. Step 3: Cross multiply
    100,550.88x = 138,754.08 × 55,220.04
  4. Step 4: Simplify right side
    100,550.88x = 7,662,005,847.76
  5. Step 5: Solve for x
    x = 7,662,005,847.76/100,550.88
  6. Step 6: Final answer
    x = 76,200.29

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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.