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Finding the Fourth Proportional to 121,790.97, 182,709.15 and 42,955.29

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Solution

The fourth proportional to 121,790.97, 182,709.15 and 42,955.29 is: 64,440.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,790.97 : 182,709.15 = 42,955.29 : x
  2. Step 2: Convert to fraction form
    121,790.97/182,709.15 = 42,955.29/x
  3. Step 3: Cross multiply
    121,790.97x = 182,709.15 × 42,955.29
  4. Step 4: Simplify right side
    121,790.97x = 7,848,324,523.90
  5. Step 5: Solve for x
    x = 7,848,324,523.90/121,790.97
  6. Step 6: Final answer
    x = 64,440.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.