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Finding the Fourth Proportional to 120,043.88, 165,663.90 and 66,332.37

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Solution

The fourth proportional to 120,043.88, 165,663.90 and 66,332.37 is: 91,540.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,043.88 : 165,663.90 = 66,332.37 : x
  2. Step 2: Convert to fraction form
    120,043.88/165,663.90 = 66,332.37/x
  3. Step 3: Cross multiply
    120,043.88x = 165,663.90 × 66,332.37
  4. Step 4: Simplify right side
    120,043.88x = 10,988,879,110.44
  5. Step 5: Solve for x
    x = 10,988,879,110.44/120,043.88
  6. Step 6: Final answer
    x = 91,540.52

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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.