Home / 80,329.36-120,456.60-42,879.28

Finding the Fourth Proportional to 80,329.36, 120,456.60 and 42,879.28

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Solution

The fourth proportional to 80,329.36, 120,456.60 and 42,879.28 is: 64,298.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,329.36 : 120,456.60 = 42,879.28 : x
  2. Step 2: Convert to fraction form
    80,329.36/120,456.60 = 42,879.28/x
  3. Step 3: Cross multiply
    80,329.36x = 120,456.60 × 42,879.28
  4. Step 4: Simplify right side
    80,329.36x = 5,165,092,279.25
  5. Step 5: Solve for x
    x = 5,165,092,279.25/80,329.36
  6. Step 6: Final answer
    x = 64,298.93

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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.