Home / 115,947.20-173,920.80-71,429.60

Finding the Fourth Proportional to 115,947.20, 173,920.80 and 71,429.60

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Solution

The fourth proportional to 115,947.20, 173,920.80 and 71,429.60 is: 107,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,947.20 : 173,920.80 = 71,429.60 : x
  2. Step 2: Convert to fraction form
    115,947.20/173,920.80 = 71,429.60/x
  3. Step 3: Cross multiply
    115,947.20x = 173,920.80 × 71,429.60
  4. Step 4: Simplify right side
    115,947.20x = 12,423,093,175.68
  5. Step 5: Solve for x
    x = 12,423,093,175.68/115,947.20
  6. Step 6: Final answer
    x = 107,144.40

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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.