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Finding the Fourth Proportional to 117,129.60, 161,638.91 and 63,414.58

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Solution

The fourth proportional to 117,129.60, 161,638.91 and 63,414.58 is: 87,512.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.60 : 161,638.91 = 63,414.58 : x
  2. Step 2: Convert to fraction form
    117,129.60/161,638.91 = 63,414.58/x
  3. Step 3: Cross multiply
    117,129.60x = 161,638.91 × 63,414.58
  4. Step 4: Simplify right side
    117,129.60x = 10,250,263,589.31
  5. Step 5: Solve for x
    x = 10,250,263,589.31/117,129.60
  6. Step 6: Final answer
    x = 87,512.15

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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.