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Finding the Fourth Proportional to 136,415.53, 188,250.85 and 75,991.15

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Solution

The fourth proportional to 136,415.53, 188,250.85 and 75,991.15 is: 104,866.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,415.53 : 188,250.85 = 75,991.15 : x
  2. Step 2: Convert to fraction form
    136,415.53/188,250.85 = 75,991.15/x
  3. Step 3: Cross multiply
    136,415.53x = 188,250.85 × 75,991.15
  4. Step 4: Simplify right side
    136,415.53x = 14,305,398,579.98
  5. Step 5: Solve for x
    x = 14,305,398,579.98/136,415.53
  6. Step 6: Final answer
    x = 104,866.35

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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.