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Finding the Fourth Proportional to 115,919.60, 173,879.40 and 112,639.10

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Solution

The fourth proportional to 115,919.60, 173,879.40 and 112,639.10 is: 168,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,919.60 : 173,879.40 = 112,639.10 : x
  2. Step 2: Convert to fraction form
    115,919.60/173,879.40 = 112,639.10/x
  3. Step 3: Cross multiply
    115,919.60x = 173,879.40 × 112,639.10
  4. Step 4: Simplify right side
    115,919.60x = 19,585,619,124.54
  5. Step 5: Solve for x
    x = 19,585,619,124.54/115,919.60
  6. Step 6: Final answer
    x = 168,958.65

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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.