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Finding the Fourth Proportional to 131,664.64, 197,496.96 and 72,469.84

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Solution

The fourth proportional to 131,664.64, 197,496.96 and 72,469.84 is: 108,704.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,664.64 : 197,496.96 = 72,469.84 : x
  2. Step 2: Convert to fraction form
    131,664.64/197,496.96 = 72,469.84/x
  3. Step 3: Cross multiply
    131,664.64x = 197,496.96 × 72,469.84
  4. Step 4: Simplify right side
    131,664.64x = 14,312,573,091.69
  5. Step 5: Solve for x
    x = 14,312,573,091.69/131,664.64
  6. Step 6: Final answer
    x = 108,704.76

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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.