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Finding the Fourth Proportional to 218,132.13, 300,921.30 and 127,491.92

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Solution

The fourth proportional to 218,132.13, 300,921.30 and 127,491.92 is: 175,879.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,132.13 : 300,921.30 = 127,491.92 : x
  2. Step 2: Convert to fraction form
    218,132.13/300,921.30 = 127,491.92/x
  3. Step 3: Cross multiply
    218,132.13x = 300,921.30 × 127,491.92
  4. Step 4: Simplify right side
    218,132.13x = 38,365,032,801.29
  5. Step 5: Solve for x
    x = 38,365,032,801.29/218,132.13
  6. Step 6: Final answer
    x = 175,879.79

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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.