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Finding the Fourth Proportional to 217,717.52, 300,447.54 and 122,221.76

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Solution

The fourth proportional to 217,717.52, 300,447.54 and 122,221.76 is: 168,664.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,717.52 : 300,447.54 = 122,221.76 : x
  2. Step 2: Convert to fraction form
    217,717.52/300,447.54 = 122,221.76/x
  3. Step 3: Cross multiply
    217,717.52x = 300,447.54 × 122,221.76
  4. Step 4: Simplify right side
    217,717.52x = 36,721,227,126.47
  5. Step 5: Solve for x
    x = 36,721,227,126.47/217,717.52
  6. Step 6: Final answer
    x = 168,664.55

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1.5x scale

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.