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Finding the Fourth Proportional to 125,919.90, 188,879.85 and 112,141.80

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Solution

The fourth proportional to 125,919.90, 188,879.85 and 112,141.80 is: 168,212.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,919.90 : 188,879.85 = 112,141.80 : x
  2. Step 2: Convert to fraction form
    125,919.90/188,879.85 = 112,141.80/x
  3. Step 3: Cross multiply
    125,919.90x = 188,879.85 × 112,141.80
  4. Step 4: Simplify right side
    125,919.90x = 21,181,326,362.73
  5. Step 5: Solve for x
    x = 21,181,326,362.73/125,919.90
  6. Step 6: Final answer
    x = 168,212.70

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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.