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Finding the Fourth Proportional to 113,791.77, 170,634.81 and 66,420.54

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Solution

The fourth proportional to 113,791.77, 170,634.81 and 66,420.54 is: 99,599.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,791.77 : 170,634.81 = 66,420.54 : x
  2. Step 2: Convert to fraction form
    113,791.77/170,634.81 = 66,420.54/x
  3. Step 3: Cross multiply
    113,791.77x = 170,634.81 × 66,420.54
  4. Step 4: Simplify right side
    113,791.77x = 11,333,656,223.00
  5. Step 5: Solve for x
    x = 11,333,656,223.00/113,791.77
  6. Step 6: Final answer
    x = 99,599.96

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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.