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Finding the Fourth Proportional to 125,879.10, 188,818.65 and 121,040.70

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Solution

The fourth proportional to 125,879.10, 188,818.65 and 121,040.70 is: 181,561.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,879.10 : 188,818.65 = 121,040.70 : x
  2. Step 2: Convert to fraction form
    125,879.10/188,818.65 = 121,040.70/x
  3. Step 3: Cross multiply
    125,879.10x = 188,818.65 × 121,040.70
  4. Step 4: Simplify right side
    125,879.10x = 22,854,741,569.06
  5. Step 5: Solve for x
    x = 22,854,741,569.06/125,879.10
  6. Step 6: Final answer
    x = 181,561.05

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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.