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Finding the Fourth Proportional to 135,168.80, 186,525.41 and 74,735.81

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Solution

The fourth proportional to 135,168.80, 186,525.41 and 74,735.81 is: 103,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,168.80 : 186,525.41 = 74,735.81 : x
  2. Step 2: Convert to fraction form
    135,168.80/186,525.41 = 74,735.81/x
  3. Step 3: Cross multiply
    135,168.80x = 186,525.41 × 74,735.81
  4. Step 4: Simplify right side
    135,168.80x = 13,940,126,295.63
  5. Step 5: Solve for x
    x = 13,940,126,295.63/135,168.80
  6. Step 6: Final answer
    x = 103,131.25

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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.