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Finding the Fourth Proportional to 143,937.88, 198,633.67 and 79,405.38

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Solution

The fourth proportional to 143,937.88, 198,633.67 and 79,405.38 is: 109,579.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,937.88 : 198,633.67 = 79,405.38 : x
  2. Step 2: Convert to fraction form
    143,937.88/198,633.67 = 79,405.38/x
  3. Step 3: Cross multiply
    143,937.88x = 198,633.67 × 79,405.38
  4. Step 4: Simplify right side
    143,937.88x = 15,772,581,848.63
  5. Step 5: Solve for x
    x = 15,772,581,848.63/143,937.88
  6. Step 6: Final answer
    x = 109,579.09

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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.