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Finding the Fourth Proportional to 143,361.78, 197,828.05 and 79,695.70

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Solution

The fourth proportional to 143,361.78, 197,828.05 and 79,695.70 is: 109,973.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,361.78 : 197,828.05 = 79,695.70 : x
  2. Step 2: Convert to fraction form
    143,361.78/197,828.05 = 79,695.70/x
  3. Step 3: Cross multiply
    143,361.78x = 197,828.05 × 79,695.70
  4. Step 4: Simplify right side
    143,361.78x = 15,766,044,924.39
  5. Step 5: Solve for x
    x = 15,766,044,924.39/143,361.78
  6. Step 6: Final answer
    x = 109,973.84

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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.