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Finding the Fourth Proportional to 119,850.84, 165,393.36 and 66,138.12

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Solution

The fourth proportional to 119,850.84, 165,393.36 and 66,138.12 is: 91,270.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,850.84 : 165,393.36 = 66,138.12 : x
  2. Step 2: Convert to fraction form
    119,850.84/165,393.36 = 66,138.12/x
  3. Step 3: Cross multiply
    119,850.84x = 165,393.36 × 66,138.12
  4. Step 4: Simplify right side
    119,850.84x = 10,938,805,890.88
  5. Step 5: Solve for x
    x = 10,938,805,890.88/119,850.84
  6. Step 6: Final answer
    x = 91,270.16

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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.