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Finding the Fourth Proportional to 77,989.73, 116,992.80 and 25,403.32

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Solution

The fourth proportional to 77,989.73, 116,992.80 and 25,403.32 is: 38,107.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,989.73 : 116,992.80 = 25,403.32 : x
  2. Step 2: Convert to fraction form
    77,989.73/116,992.80 = 25,403.32/x
  3. Step 3: Cross multiply
    77,989.73x = 116,992.80 × 25,403.32
  4. Step 4: Simplify right side
    77,989.73x = 2,972,004,824.12
  5. Step 5: Solve for x
    x = 2,972,004,824.12/77,989.73
  6. Step 6: Final answer
    x = 38,107.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.