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Finding the Fourth Proportional to 120,063.48, 165,679.36 and 66,348

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Solution

The fourth proportional to 120,063.48, 165,679.36 and 66,348 is: 91,555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,063.48 : 165,679.36 = 66,348 : x
  2. Step 2: Convert to fraction form
    120,063.48/165,679.36 = 66,348/x
  3. Step 3: Cross multiply
    120,063.48x = 165,679.36 × 66,348
  4. Step 4: Simplify right side
    120,063.48x = 10,992,494,177.28
  5. Step 5: Solve for x
    x = 10,992,494,177.28/120,063.48
  6. Step 6: Final answer
    x = 91,555.69

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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.