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Finding the Fourth Proportional to 117,289.38, 161,881.02 and 66,988.38

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Solution

The fourth proportional to 117,289.38, 161,881.02 and 66,988.38 is: 92,456.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,289.38 : 161,881.02 = 66,988.38 : x
  2. Step 2: Convert to fraction form
    117,289.38/161,881.02 = 66,988.38/x
  3. Step 3: Cross multiply
    117,289.38x = 161,881.02 × 66,988.38
  4. Step 4: Simplify right side
    117,289.38x = 10,844,147,282.55
  5. Step 5: Solve for x
    x = 10,844,147,282.55/117,289.38
  6. Step 6: Final answer
    x = 92,456.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.