Home / 78,085.04-117,174.20-71,732.66

Finding the Fourth Proportional to 78,085.04, 117,174.20 and 71,732.66

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Solution

The fourth proportional to 78,085.04, 117,174.20 and 71,732.66 is: 107,641.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,085.04 : 117,174.20 = 71,732.66 : x
  2. Step 2: Convert to fraction form
    78,085.04/117,174.20 = 71,732.66/x
  3. Step 3: Cross multiply
    78,085.04x = 117,174.20 × 71,732.66
  4. Step 4: Simplify right side
    78,085.04x = 8,405,217,049.37
  5. Step 5: Solve for x
    x = 8,405,217,049.37/78,085.04
  6. Step 6: Final answer
    x = 107,641.84

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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.