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Finding the Fourth Proportional to 133,328.97, 183,986.46 and 72,888.39

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Solution

The fourth proportional to 133,328.97, 183,986.46 and 72,888.39 is: 100,581.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,328.97 : 183,986.46 = 72,888.39 : x
  2. Step 2: Convert to fraction form
    133,328.97/183,986.46 = 72,888.39/x
  3. Step 3: Cross multiply
    133,328.97x = 183,986.46 × 72,888.39
  4. Step 4: Simplify right side
    133,328.97x = 13,410,476,851.20
  5. Step 5: Solve for x
    x = 13,410,476,851.20/133,328.97
  6. Step 6: Final answer
    x = 100,581.87

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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.