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Finding the Fourth Proportional to 143,878.31, 198,554.55 and 79,354.96

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Solution

The fourth proportional to 143,878.31, 198,554.55 and 79,354.96 is: 109,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,878.31 : 198,554.55 = 79,354.96 : x
  2. Step 2: Convert to fraction form
    143,878.31/198,554.55 = 79,354.96/x
  3. Step 3: Cross multiply
    143,878.31x = 198,554.55 × 79,354.96
  4. Step 4: Simplify right side
    143,878.31x = 15,756,286,983.52
  5. Step 5: Solve for x
    x = 15,756,286,983.52/143,878.31
  6. Step 6: Final answer
    x = 109,511.20

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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.