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Finding the Fourth Proportional to 116,889.90, 161,309.79 and 66,587.82

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Solution

The fourth proportional to 116,889.90, 161,309.79 and 66,587.82 is: 91,892.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,889.90 : 161,309.79 = 66,587.82 : x
  2. Step 2: Convert to fraction form
    116,889.90/161,309.79 = 66,587.82/x
  3. Step 3: Cross multiply
    116,889.90x = 161,309.79 × 66,587.82
  4. Step 4: Simplify right side
    116,889.90x = 10,741,267,260.76
  5. Step 5: Solve for x
    x = 10,741,267,260.76/116,889.90
  6. Step 6: Final answer
    x = 91,892.18

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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.