Home / 106,749.09-159,994.16-78,406.34

Finding the Fourth Proportional to 106,749.09, 159,994.16 and 78,406.34

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Solution

The fourth proportional to 106,749.09, 159,994.16 and 78,406.34 is: 117,514.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,749.09 : 159,994.16 = 78,406.34 : x
  2. Step 2: Convert to fraction form
    106,749.09/159,994.16 = 78,406.34/x
  3. Step 3: Cross multiply
    106,749.09x = 159,994.16 × 78,406.34
  4. Step 4: Simplify right side
    106,749.09x = 12,544,555,314.97
  5. Step 5: Solve for x
    x = 12,544,555,314.97/106,749.09
  6. Step 6: Final answer
    x = 117,514.40

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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.