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Finding the Fourth Proportional to 104,978.73, 144,824.92 and 66,717.78

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Solution

The fourth proportional to 104,978.73, 144,824.92 and 66,717.78 is: 92,041.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,978.73 : 144,824.92 = 66,717.78 : x
  2. Step 2: Convert to fraction form
    104,978.73/144,824.92 = 66,717.78/x
  3. Step 3: Cross multiply
    104,978.73x = 144,824.92 × 66,717.78
  4. Step 4: Simplify right side
    104,978.73x = 9,662,397,151.08
  5. Step 5: Solve for x
    x = 9,662,397,151.08/104,978.73
  6. Step 6: Final answer
    x = 92,041.47

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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.