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Finding the Fourth Proportional to 117,216.78, 161,973.72 and 85,330.32

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Solution

The fourth proportional to 117,216.78, 161,973.72 and 85,330.32 is: 117,912.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,216.78 : 161,973.72 = 85,330.32 : x
  2. Step 2: Convert to fraction form
    117,216.78/161,973.72 = 85,330.32/x
  3. Step 3: Cross multiply
    117,216.78x = 161,973.72 × 85,330.32
  4. Step 4: Simplify right side
    117,216.78x = 13,821,269,359.19
  5. Step 5: Solve for x
    x = 13,821,269,359.19/117,216.78
  6. Step 6: Final answer
    x = 117,912.04

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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.