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Finding the Fourth Proportional to 169,813.44, 254,715.84 and 81,129.60

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Solution

The fourth proportional to 169,813.44, 254,715.84 and 81,129.60 is: 121,692.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,813.44 : 254,715.84 = 81,129.60 : x
  2. Step 2: Convert to fraction form
    169,813.44/254,715.84 = 81,129.60/x
  3. Step 3: Cross multiply
    169,813.44x = 254,715.84 × 81,129.60
  4. Step 4: Simplify right side
    169,813.44x = 20,664,994,212.86
  5. Step 5: Solve for x
    x = 20,664,994,212.86/169,813.44
  6. Step 6: Final answer
    x = 121,692.34

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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.