Home / 80,828.15-111,556.04-61,671.65

Finding the Fourth Proportional to 80,828.15, 111,556.04 and 61,671.65

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Solution

The fourth proportional to 80,828.15, 111,556.04 and 61,671.65 is: 85,116.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,828.15 : 111,556.04 = 61,671.65 : x
  2. Step 2: Convert to fraction form
    80,828.15/111,556.04 = 61,671.65/x
  3. Step 3: Cross multiply
    80,828.15x = 111,556.04 × 61,671.65
  4. Step 4: Simplify right side
    80,828.15x = 6,879,844,188.13
  5. Step 5: Solve for x
    x = 6,879,844,188.13/80,828.15
  6. Step 6: Final answer
    x = 85,116.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.