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Finding the Fourth Proportional to 143,135.64, 197,521.20 and 79,469.64

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Solution

The fourth proportional to 143,135.64, 197,521.20 and 79,469.64 is: 109,664.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,135.64 : 197,521.20 = 79,469.64 : x
  2. Step 2: Convert to fraction form
    143,135.64/197,521.20 = 79,469.64/x
  3. Step 3: Cross multiply
    143,135.64x = 197,521.20 × 79,469.64
  4. Step 4: Simplify right side
    143,135.64x = 15,696,938,656.37
  5. Step 5: Solve for x
    x = 15,696,938,656.37/143,135.64
  6. Step 6: Final answer
    x = 109,664.78

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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.