Home / 142,553.08-196,729.43-78,890.90

Finding the Fourth Proportional to 142,553.08, 196,729.43 and 78,890.90

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Solution

The fourth proportional to 142,553.08, 196,729.43 and 78,890.90 is: 108,872.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,553.08 : 196,729.43 = 78,890.90 : x
  2. Step 2: Convert to fraction form
    142,553.08/196,729.43 = 78,890.90/x
  3. Step 3: Cross multiply
    142,553.08x = 196,729.43 × 78,890.90
  4. Step 4: Simplify right side
    142,553.08x = 15,520,161,789.19
  5. Step 5: Solve for x
    x = 15,520,161,789.19/142,553.08
  6. Step 6: Final answer
    x = 108,872.86

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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.