Home / 78,218.04-107,912.58-51,375.12

Finding the Fourth Proportional to 78,218.04, 107,912.58 and 51,375.12

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Solution

The fourth proportional to 78,218.04, 107,912.58 and 51,375.12 is: 70,879.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,218.04 : 107,912.58 = 51,375.12 : x
  2. Step 2: Convert to fraction form
    78,218.04/107,912.58 = 51,375.12/x
  3. Step 3: Cross multiply
    78,218.04x = 107,912.58 × 51,375.12
  4. Step 4: Simplify right side
    78,218.04x = 5,544,021,747.01
  5. Step 5: Solve for x
    x = 5,544,021,747.01/78,218.04
  6. Step 6: Final answer
    x = 70,879.07

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1.5x scale

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.