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Finding the Fourth Proportional to 81,889.92, 112,968 and 50,003.64

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Solution

The fourth proportional to 81,889.92, 112,968 and 50,003.64 is: 68,980.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,889.92 : 112,968 = 50,003.64 : x
  2. Step 2: Convert to fraction form
    81,889.92/112,968 = 50,003.64/x
  3. Step 3: Cross multiply
    81,889.92x = 112,968 × 50,003.64
  4. Step 4: Simplify right side
    81,889.92x = 5,648,811,203.52
  5. Step 5: Solve for x
    x = 5,648,811,203.52/81,889.92
  6. Step 6: Final answer
    x = 68,980.54

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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.