Home / 81,127.91-121,644.45-54,504.83

Finding the Fourth Proportional to 81,127.91, 121,644.45 and 54,504.83

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Solution

The fourth proportional to 81,127.91, 121,644.45 and 54,504.83 is: 81,725.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,127.91 : 121,644.45 = 54,504.83 : x
  2. Step 2: Convert to fraction form
    81,127.91/121,644.45 = 54,504.83/x
  3. Step 3: Cross multiply
    81,127.91x = 121,644.45 × 54,504.83
  4. Step 4: Simplify right side
    81,127.91x = 6,630,210,371.80
  5. Step 5: Solve for x
    x = 6,630,210,371.80/81,127.91
  6. Step 6: Final answer
    x = 81,725.39

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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.