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Finding the Fourth Proportional to 82,957.86, 124,436.88 and 20,628.36

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Solution

The fourth proportional to 82,957.86, 124,436.88 and 20,628.36 is: 30,942.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,957.86 : 124,436.88 = 20,628.36 : x
  2. Step 2: Convert to fraction form
    82,957.86/124,436.88 = 20,628.36/x
  3. Step 3: Cross multiply
    82,957.86x = 124,436.88 × 20,628.36
  4. Step 4: Simplify right side
    82,957.86x = 2,566,928,757.92
  5. Step 5: Solve for x
    x = 2,566,928,757.92/82,957.86
  6. Step 6: Final answer
    x = 30,942.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.