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Finding the Fourth Proportional to 91,940.91, 126,878.58 and 51,654.71

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Solution

The fourth proportional to 91,940.91, 126,878.58 and 51,654.71 is: 71,283.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,940.91 : 126,878.58 = 51,654.71 : x
  2. Step 2: Convert to fraction form
    91,940.91/126,878.58 = 51,654.71/x
  3. Step 3: Cross multiply
    91,940.91x = 126,878.58 × 51,654.71
  4. Step 4: Simplify right side
    91,940.91x = 6,553,875,620.72
  5. Step 5: Solve for x
    x = 6,553,875,620.72/91,940.91
  6. Step 6: Final answer
    x = 71,283.56

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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.