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Finding the Fourth Proportional to 163,418.91, 225,505.80 and 91,784.94

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Solution

The fourth proportional to 163,418.91, 225,505.80 and 91,784.94 is: 126,656.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,418.91 : 225,505.80 = 91,784.94 : x
  2. Step 2: Convert to fraction form
    163,418.91/225,505.80 = 91,784.94/x
  3. Step 3: Cross multiply
    163,418.91x = 225,505.80 × 91,784.94
  4. Step 4: Simplify right side
    163,418.91x = 20,698,036,322.65
  5. Step 5: Solve for x
    x = 20,698,036,322.65/163,418.91
  6. Step 6: Final answer
    x = 126,656.31

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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.