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Finding the Fourth Proportional to 133,290.63, 183,928.41 and 72,857.43

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Solution

The fourth proportional to 133,290.63, 183,928.41 and 72,857.43 is: 100,536.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,290.63 : 183,928.41 = 72,857.43 : x
  2. Step 2: Convert to fraction form
    133,290.63/183,928.41 = 72,857.43/x
  3. Step 3: Cross multiply
    133,290.63x = 183,928.41 × 72,857.43
  4. Step 4: Simplify right side
    133,290.63x = 13,400,551,256.59
  5. Step 5: Solve for x
    x = 13,400,551,256.59/133,290.63
  6. Step 6: Final answer
    x = 100,536.33

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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.