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Finding the Fourth Proportional to 218,354.69, 301,335.36 and 122,864.78

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Solution

The fourth proportional to 218,354.69, 301,335.36 and 122,864.78 is: 169,556.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,354.69 : 301,335.36 = 122,864.78 : x
  2. Step 2: Convert to fraction form
    218,354.69/301,335.36 = 122,864.78/x
  3. Step 3: Cross multiply
    218,354.69x = 301,335.36 × 122,864.78
  4. Step 4: Simplify right side
    218,354.69x = 37,023,502,712.62
  5. Step 5: Solve for x
    x = 37,023,502,712.62/218,354.69
  6. Step 6: Final answer
    x = 169,556.71

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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.