Home / 115,789.20-173,683.80-78,367.20

Finding the Fourth Proportional to 115,789.20, 173,683.80 and 78,367.20

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Solution

The fourth proportional to 115,789.20, 173,683.80 and 78,367.20 is: 117,550.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,789.20 : 173,683.80 = 78,367.20 : x
  2. Step 2: Convert to fraction form
    115,789.20/173,683.80 = 78,367.20/x
  3. Step 3: Cross multiply
    115,789.20x = 173,683.80 × 78,367.20
  4. Step 4: Simplify right side
    115,789.20x = 13,611,113,091.36
  5. Step 5: Solve for x
    x = 13,611,113,091.36/115,789.20
  6. Step 6: Final answer
    x = 117,550.80

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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.