Home / 143,786.78-198,402.40-83,345.61

Finding the Fourth Proportional to 143,786.78, 198,402.40 and 83,345.61

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Solution

The fourth proportional to 143,786.78, 198,402.40 and 83,345.61 is: 115,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,786.78 : 198,402.40 = 83,345.61 : x
  2. Step 2: Convert to fraction form
    143,786.78/198,402.40 = 83,345.61/x
  3. Step 3: Cross multiply
    143,786.78x = 198,402.40 × 83,345.61
  4. Step 4: Simplify right side
    143,786.78x = 16,535,969,053.46
  5. Step 5: Solve for x
    x = 16,535,969,053.46/143,786.78
  6. Step 6: Final answer
    x = 115,003.40

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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.