Home / 81,669.28-122,983.60-71,263.40

Finding the Fourth Proportional to 81,669.28, 122,983.60 and 71,263.40

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Solution

The fourth proportional to 81,669.28, 122,983.60 and 71,263.40 is: 107,313.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,669.28 : 122,983.60 = 71,263.40 : x
  2. Step 2: Convert to fraction form
    81,669.28/122,983.60 = 71,263.40/x
  3. Step 3: Cross multiply
    81,669.28x = 122,983.60 × 71,263.40
  4. Step 4: Simplify right side
    81,669.28x = 8,764,229,480.24
  5. Step 5: Solve for x
    x = 8,764,229,480.24/81,669.28
  6. Step 6: Final answer
    x = 107,313.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.