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Finding the Fourth Proportional to 120,269.49, 165,969.41 and 66,551.28

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Solution

The fourth proportional to 120,269.49, 165,969.41 and 66,551.28 is: 91,839.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,269.49 : 165,969.41 = 66,551.28 : x
  2. Step 2: Convert to fraction form
    120,269.49/165,969.41 = 66,551.28/x
  3. Step 3: Cross multiply
    120,269.49x = 165,969.41 × 66,551.28
  4. Step 4: Simplify right side
    120,269.49x = 11,045,476,343.59
  5. Step 5: Solve for x
    x = 11,045,476,343.59/120,269.49
  6. Step 6: Final answer
    x = 91,839.39

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1.5x scale

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.