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Finding the Fourth Proportional to 117,116.44, 161,639.64 and 71,819.44

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Solution

The fourth proportional to 117,116.44, 161,639.64 and 71,819.44 is: 99,122.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,116.44 : 161,639.64 = 71,819.44 : x
  2. Step 2: Convert to fraction form
    117,116.44/161,639.64 = 71,819.44/x
  3. Step 3: Cross multiply
    117,116.44x = 161,639.64 × 71,819.44
  4. Step 4: Simplify right side
    117,116.44x = 11,608,868,426.60
  5. Step 5: Solve for x
    x = 11,608,868,426.60/117,116.44
  6. Step 6: Final answer
    x = 99,122.45

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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.