Home / 143,918.60-198,608.10-79,386.28

Finding the Fourth Proportional to 143,918.60, 198,608.10 and 79,386.28

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Solution

The fourth proportional to 143,918.60, 198,608.10 and 79,386.28 is: 109,553.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,918.60 : 198,608.10 = 79,386.28 : x
  2. Step 2: Convert to fraction form
    143,918.60/198,608.10 = 79,386.28/x
  3. Step 3: Cross multiply
    143,918.60x = 198,608.10 × 79,386.28
  4. Step 4: Simplify right side
    143,918.60x = 15,766,758,236.87
  5. Step 5: Solve for x
    x = 15,766,758,236.87/143,918.60
  6. Step 6: Final answer
    x = 109,553.30

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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.