Home / 106,747.09-159,991.16-78,404.34

Finding the Fourth Proportional to 106,747.09, 159,991.16 and 78,404.34

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Solution

The fourth proportional to 106,747.09, 159,991.16 and 78,404.34 is: 117,511.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,747.09 : 159,991.16 = 78,404.34 : x
  2. Step 2: Convert to fraction form
    106,747.09/159,991.16 = 78,404.34/x
  3. Step 3: Cross multiply
    106,747.09x = 159,991.16 × 78,404.34
  4. Step 4: Simplify right side
    106,747.09x = 12,544,000,309.67
  5. Step 5: Solve for x
    x = 12,544,000,309.67/106,747.09
  6. Step 6: Final answer
    x = 117,511.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.