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Finding the Fourth Proportional to 117,134.72, 161,639.36 and 69,392.64

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Solution

The fourth proportional to 117,134.72, 161,639.36 and 69,392.64 is: 95,757.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,134.72 : 161,639.36 = 69,392.64 : x
  2. Step 2: Convert to fraction form
    117,134.72/161,639.36 = 69,392.64/x
  3. Step 3: Cross multiply
    117,134.72x = 161,639.36 × 69,392.64
  4. Step 4: Simplify right side
    117,134.72x = 11,216,581,918.31
  5. Step 5: Solve for x
    x = 11,216,581,918.31/117,134.72
  6. Step 6: Final answer
    x = 95,757.96

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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.