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Finding the Fourth Proportional to 143,692.92, 198,305.55 and 80,040.42

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Solution

The fourth proportional to 143,692.92, 198,305.55 and 80,040.42 is: 110,460.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,692.92 : 198,305.55 = 80,040.42 : x
  2. Step 2: Convert to fraction form
    143,692.92/198,305.55 = 80,040.42/x
  3. Step 3: Cross multiply
    143,692.92x = 198,305.55 × 80,040.42
  4. Step 4: Simplify right side
    143,692.92x = 15,872,459,510.33
  5. Step 5: Solve for x
    x = 15,872,459,510.33/143,692.92
  6. Step 6: Final answer
    x = 110,460.97

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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.