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Finding the Fourth Proportional to 116,669.70, 161,004.78 and 66,368.70

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Solution

The fourth proportional to 116,669.70, 161,004.78 and 66,368.70 is: 91,589.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,669.70 : 161,004.78 = 66,368.70 : x
  2. Step 2: Convert to fraction form
    116,669.70/161,004.78 = 66,368.70/x
  3. Step 3: Cross multiply
    116,669.70x = 161,004.78 × 66,368.70
  4. Step 4: Simplify right side
    116,669.70x = 10,685,677,942.39
  5. Step 5: Solve for x
    x = 10,685,677,942.39/116,669.70
  6. Step 6: Final answer
    x = 91,589.14

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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.