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Finding the Fourth Proportional to 128,954.73, 193,394.70 and 54,072.93

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Solution

The fourth proportional to 128,954.73, 193,394.70 and 54,072.93 is: 81,093.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,954.73 : 193,394.70 = 54,072.93 : x
  2. Step 2: Convert to fraction form
    128,954.73/193,394.70 = 54,072.93/x
  3. Step 3: Cross multiply
    128,954.73x = 193,394.70 × 54,072.93
  4. Step 4: Simplify right side
    128,954.73x = 10,457,418,075.47
  5. Step 5: Solve for x
    x = 10,457,418,075.47/128,954.73
  6. Step 6: Final answer
    x = 81,093.71

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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.