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Finding the Fourth Proportional to 217,196, 299,747.76 and 127,789.28

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Solution

The fourth proportional to 217,196, 299,747.76 and 127,789.28 is: 176,359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,196 : 299,747.76 = 127,789.28 : x
  2. Step 2: Convert to fraction form
    217,196/299,747.76 = 127,789.28/x
  3. Step 3: Cross multiply
    217,196x = 299,747.76 × 127,789.28
  4. Step 4: Simplify right side
    217,196x = 38,304,550,432.01
  5. Step 5: Solve for x
    x = 38,304,550,432.01/217,196
  6. Step 6: Final answer
    x = 176,359.37

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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.