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Finding the Fourth Proportional to 121,429.10, 183,078 and 119,251.82

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Solution

The fourth proportional to 121,429.10, 183,078 and 119,251.82 is: 179,795.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,429.10 : 183,078 = 119,251.82 : x
  2. Step 2: Convert to fraction form
    121,429.10/183,078 = 119,251.82/x
  3. Step 3: Cross multiply
    121,429.10x = 183,078 × 119,251.82
  4. Step 4: Simplify right side
    121,429.10x = 21,832,384,701.96
  5. Step 5: Solve for x
    x = 21,832,384,701.96/121,429.10
  6. Step 6: Final answer
    x = 179,795.33

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.