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Finding the Fourth Proportional to 121,806.90, 182,645.55 and 51,606.90

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Solution

The fourth proportional to 121,806.90, 182,645.55 and 51,606.90 is: 77,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,806.90 : 182,645.55 = 51,606.90 : x
  2. Step 2: Convert to fraction form
    121,806.90/182,645.55 = 51,606.90/x
  3. Step 3: Cross multiply
    121,806.90x = 182,645.55 × 51,606.90
  4. Step 4: Simplify right side
    121,806.90x = 9,425,770,634.30
  5. Step 5: Solve for x
    x = 9,425,770,634.30/121,806.90
  6. Step 6: Final answer
    x = 77,382.90

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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.