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Finding the Fourth Proportional to 115,919.80, 173,879.70 and 108,086.20

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Solution

The fourth proportional to 115,919.80, 173,879.70 and 108,086.20 is: 162,129.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,919.80 : 173,879.70 = 108,086.20 : x
  2. Step 2: Convert to fraction form
    115,919.80/173,879.70 = 108,086.20/x
  3. Step 3: Cross multiply
    115,919.80x = 173,879.70 × 108,086.20
  4. Step 4: Simplify right side
    115,919.80x = 18,793,996,030.14
  5. Step 5: Solve for x
    x = 18,793,996,030.14/115,919.80
  6. Step 6: Final answer
    x = 162,129.30

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1.5x scale

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.