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Finding the Fourth Proportional to 143,482.69, 198,005.16 and 78,955.86

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Solution

The fourth proportional to 143,482.69, 198,005.16 and 78,955.86 is: 108,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,482.69 : 198,005.16 = 78,955.86 : x
  2. Step 2: Convert to fraction form
    143,482.69/198,005.16 = 78,955.86/x
  3. Step 3: Cross multiply
    143,482.69x = 198,005.16 × 78,955.86
  4. Step 4: Simplify right side
    143,482.69x = 15,633,667,692.24
  5. Step 5: Solve for x
    x = 15,633,667,692.24/143,482.69
  6. Step 6: Final answer
    x = 108,958.56

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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.