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Finding the Fourth Proportional to 84,473.90, 116,439.97 and 66,540.50

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Solution

The fourth proportional to 84,473.90, 116,439.97 and 66,540.50 is: 91,720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,473.90 : 116,439.97 = 66,540.50 : x
  2. Step 2: Convert to fraction form
    84,473.90/116,439.97 = 66,540.50/x
  3. Step 3: Cross multiply
    84,473.90x = 116,439.97 × 66,540.50
  4. Step 4: Simplify right side
    84,473.90x = 7,747,973,823.79
  5. Step 5: Solve for x
    x = 7,747,973,823.79/84,473.90
  6. Step 6: Final answer
    x = 91,720.33

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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.