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Finding the Fourth Proportional to 143,574.75, 198,133.16 and 79,911.18

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Solution

The fourth proportional to 143,574.75, 198,133.16 and 79,911.18 is: 110,277.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,574.75 : 198,133.16 = 79,911.18 : x
  2. Step 2: Convert to fraction form
    143,574.75/198,133.16 = 79,911.18/x
  3. Step 3: Cross multiply
    143,574.75x = 198,133.16 × 79,911.18
  4. Step 4: Simplify right side
    143,574.75x = 15,833,054,213.17
  5. Step 5: Solve for x
    x = 15,833,054,213.17/143,574.75
  6. Step 6: Final answer
    x = 110,277.43

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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.