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Finding the Fourth Proportional to 143,980.68, 198,699.48 and 80,318.46

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Solution

The fourth proportional to 143,980.68, 198,699.48 and 80,318.46 is: 110,842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,980.68 : 198,699.48 = 80,318.46 : x
  2. Step 2: Convert to fraction form
    143,980.68/198,699.48 = 80,318.46/x
  3. Step 3: Cross multiply
    143,980.68x = 198,699.48 × 80,318.46
  4. Step 4: Simplify right side
    143,980.68x = 15,959,236,236.40
  5. Step 5: Solve for x
    x = 15,959,236,236.40/143,980.68
  6. Step 6: Final answer
    x = 110,842.90

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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.