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Finding the Fourth Proportional to 81,571.92, 112,504.30 and 67,400.16

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Solution

The fourth proportional to 81,571.92, 112,504.30 and 67,400.16 is: 92,958.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,571.92 : 112,504.30 = 67,400.16 : x
  2. Step 2: Convert to fraction form
    81,571.92/112,504.30 = 67,400.16/x
  3. Step 3: Cross multiply
    81,571.92x = 112,504.30 × 67,400.16
  4. Step 4: Simplify right side
    81,571.92x = 7,582,807,820.69
  5. Step 5: Solve for x
    x = 7,582,807,820.69/81,571.92
  6. Step 6: Final answer
    x = 92,958.56

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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.