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Finding the Fourth Proportional to 135,449.45, 186,917.54 and 75,020.59

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Solution

The fourth proportional to 135,449.45, 186,917.54 and 75,020.59 is: 103,526.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,449.45 : 186,917.54 = 75,020.59 : x
  2. Step 2: Convert to fraction form
    135,449.45/186,917.54 = 75,020.59/x
  3. Step 3: Cross multiply
    135,449.45x = 186,917.54 × 75,020.59
  4. Step 4: Simplify right side
    135,449.45x = 14,022,664,359.04
  5. Step 5: Solve for x
    x = 14,022,664,359.04/135,449.45
  6. Step 6: Final answer
    x = 103,526.92

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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.