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Finding the Fourth Proportional to 143,770.79, 198,405 and 79,242.36

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Solution

The fourth proportional to 143,770.79, 198,405 and 79,242.36 is: 109,355.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,770.79 : 198,405 = 79,242.36 : x
  2. Step 2: Convert to fraction form
    143,770.79/198,405 = 79,242.36/x
  3. Step 3: Cross multiply
    143,770.79x = 198,405 × 79,242.36
  4. Step 4: Simplify right side
    143,770.79x = 15,722,080,435.80
  5. Step 5: Solve for x
    x = 15,722,080,435.80/143,770.79
  6. Step 6: Final answer
    x = 109,355.18

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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.