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Finding the Fourth Proportional to 116,897.81, 161,315.73 and 65,910.11

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Solution

The fourth proportional to 116,897.81, 161,315.73 and 65,910.11 is: 90,954.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,897.81 : 161,315.73 = 65,910.11 : x
  2. Step 2: Convert to fraction form
    116,897.81/161,315.73 = 65,910.11/x
  3. Step 3: Cross multiply
    116,897.81x = 161,315.73 × 65,910.11
  4. Step 4: Simplify right side
    116,897.81x = 10,632,336,517.08
  5. Step 5: Solve for x
    x = 10,632,336,517.08/116,897.81
  6. Step 6: Final answer
    x = 90,954.11

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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.