Home / 143,772.35-198,406.64-83,378.81

Finding the Fourth Proportional to 143,772.35, 198,406.64 and 83,378.81

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Solution

The fourth proportional to 143,772.35, 198,406.64 and 83,378.81 is: 115,063.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,772.35 : 198,406.64 = 83,378.81 : x
  2. Step 2: Convert to fraction form
    143,772.35/198,406.64 = 83,378.81/x
  3. Step 3: Cross multiply
    143,772.35x = 198,406.64 × 83,378.81
  4. Step 4: Simplify right side
    143,772.35x = 16,542,908,130.37
  5. Step 5: Solve for x
    x = 16,542,908,130.37/143,772.35
  6. Step 6: Final answer
    x = 115,063.21

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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.