Home / 81,891.27-122,812.20-31,957.88

Finding the Fourth Proportional to 81,891.27, 122,812.20 and 31,957.88

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Solution

The fourth proportional to 81,891.27, 122,812.20 and 31,957.88 is: 47,927.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,891.27 : 122,812.20 = 31,957.88 : x
  2. Step 2: Convert to fraction form
    81,891.27/122,812.20 = 31,957.88/x
  3. Step 3: Cross multiply
    81,891.27x = 122,812.20 × 31,957.88
  4. Step 4: Simplify right side
    81,891.27x = 3,924,816,936.08
  5. Step 5: Solve for x
    x = 3,924,816,936.08/81,891.27
  6. Step 6: Final answer
    x = 47,927.17

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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.