Home / 66,960.48-100,375.92-31,890.72

Finding the Fourth Proportional to 66,960.48, 100,375.92 and 31,890.72

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Solution

The fourth proportional to 66,960.48, 100,375.92 and 31,890.72 is: 47,805.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,960.48 : 100,375.92 = 31,890.72 : x
  2. Step 2: Convert to fraction form
    66,960.48/100,375.92 = 31,890.72/x
  3. Step 3: Cross multiply
    66,960.48x = 100,375.92 × 31,890.72
  4. Step 4: Simplify right side
    66,960.48x = 3,201,060,359.46
  5. Step 5: Solve for x
    x = 3,201,060,359.46/66,960.48
  6. Step 6: Final answer
    x = 47,805.22

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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.