Home / 78,997.92-109,005.20-50,707.36

Finding the Fourth Proportional to 78,997.92, 109,005.20 and 50,707.36

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Solution

The fourth proportional to 78,997.92, 109,005.20 and 50,707.36 is: 69,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,997.92 : 109,005.20 = 50,707.36 : x
  2. Step 2: Convert to fraction form
    78,997.92/109,005.20 = 50,707.36/x
  3. Step 3: Cross multiply
    78,997.92x = 109,005.20 × 50,707.36
  4. Step 4: Simplify right side
    78,997.92x = 5,527,365,918.27
  5. Step 5: Solve for x
    x = 5,527,365,918.27/78,997.92
  6. Step 6: Final answer
    x = 69,968.50

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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.