Home / 143,783.58-198,418.64-78,372.94

Finding the Fourth Proportional to 143,783.58, 198,418.64 and 78,372.94

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Solution

The fourth proportional to 143,783.58, 198,418.64 and 78,372.94 is: 108,153.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,783.58 : 198,418.64 = 78,372.94 : x
  2. Step 2: Convert to fraction form
    143,783.58/198,418.64 = 78,372.94/x
  3. Step 3: Cross multiply
    143,783.58x = 198,418.64 × 78,372.94
  4. Step 4: Simplify right side
    143,783.58x = 15,550,652,167.60
  5. Step 5: Solve for x
    x = 15,550,652,167.60/143,783.58
  6. Step 6: Final answer
    x = 108,153.19

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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.