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Finding the Fourth Proportional to 117,129.96, 161,639.44 and 63,415.01

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Solution

The fourth proportional to 117,129.96, 161,639.44 and 63,415.01 is: 87,512.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,129.96 : 161,639.44 = 63,415.01 : x
  2. Step 2: Convert to fraction form
    117,129.96/161,639.44 = 63,415.01/x
  3. Step 3: Cross multiply
    117,129.96x = 161,639.44 × 63,415.01
  4. Step 4: Simplify right side
    117,129.96x = 10,250,366,949.56
  5. Step 5: Solve for x
    x = 10,250,366,949.56/117,129.96
  6. Step 6: Final answer
    x = 87,512.77

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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.