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Finding the Fourth Proportional to 107,969.94, 162,009.60 and 72,835.77

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Solution

The fourth proportional to 107,969.94, 162,009.60 and 72,835.77 is: 109,290.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,969.94 : 162,009.60 = 72,835.77 : x
  2. Step 2: Convert to fraction form
    107,969.94/162,009.60 = 72,835.77/x
  3. Step 3: Cross multiply
    107,969.94x = 162,009.60 × 72,835.77
  4. Step 4: Simplify right side
    107,969.94x = 11,800,093,963.39
  5. Step 5: Solve for x
    x = 11,800,093,963.39/107,969.94
  6. Step 6: Final answer
    x = 109,290.55

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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.