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Finding the Fourth Proportional to 223,514.60, 308,445.76 and 121,539.20

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Solution

The fourth proportional to 223,514.60, 308,445.76 and 121,539.20 is: 167,721.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,514.60 : 308,445.76 = 121,539.20 : x
  2. Step 2: Convert to fraction form
    223,514.60/308,445.76 = 121,539.20/x
  3. Step 3: Cross multiply
    223,514.60x = 308,445.76 × 121,539.20
  4. Step 4: Simplify right side
    223,514.60x = 37,488,250,913.79
  5. Step 5: Solve for x
    x = 37,488,250,913.79/223,514.60
  6. Step 6: Final answer
    x = 167,721.71

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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.