Home / 143,648.40-198,230.73-78,235.75

Finding the Fourth Proportional to 143,648.40, 198,230.73 and 78,235.75

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Solution

The fourth proportional to 143,648.40, 198,230.73 and 78,235.75 is: 107,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,648.40 : 198,230.73 = 78,235.75 : x
  2. Step 2: Convert to fraction form
    143,648.40/198,230.73 = 78,235.75/x
  3. Step 3: Cross multiply
    143,648.40x = 198,230.73 × 78,235.75
  4. Step 4: Simplify right side
    143,648.40x = 15,508,729,929.09
  5. Step 5: Solve for x
    x = 15,508,729,929.09/143,648.40
  6. Step 6: Final answer
    x = 107,963.12

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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.