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Finding the Fourth Proportional to 99,791.76, 149,608.11 and 57,623.97

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Solution

The fourth proportional to 99,791.76, 149,608.11 and 57,623.97 is: 86,390.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,791.76 : 149,608.11 = 57,623.97 : x
  2. Step 2: Convert to fraction form
    99,791.76/149,608.11 = 57,623.97/x
  3. Step 3: Cross multiply
    99,791.76x = 149,608.11 × 57,623.97
  4. Step 4: Simplify right side
    99,791.76x = 8,621,013,242.40
  5. Step 5: Solve for x
    x = 8,621,013,242.40/99,791.76
  6. Step 6: Final answer
    x = 86,390.03

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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.