Home / 106,705.15-159,770.91-81,283.57

Finding the Fourth Proportional to 106,705.15, 159,770.91 and 81,283.57

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Solution

The fourth proportional to 106,705.15, 159,770.91 and 81,283.57 is: 121,706.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,705.15 : 159,770.91 = 81,283.57 : x
  2. Step 2: Convert to fraction form
    106,705.15/159,770.91 = 81,283.57/x
  3. Step 3: Cross multiply
    106,705.15x = 159,770.91 × 81,283.57
  4. Step 4: Simplify right side
    106,705.15x = 12,986,749,680.88
  5. Step 5: Solve for x
    x = 12,986,749,680.88/106,705.15
  6. Step 6: Final answer
    x = 121,706.87

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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.