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Finding the Fourth Proportional to 305,662.80, 458,514.45 and 81,020.10

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Solution

The fourth proportional to 305,662.80, 458,514.45 and 81,020.10 is: 121,535.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,662.80 : 458,514.45 = 81,020.10 : x
  2. Step 2: Convert to fraction form
    305,662.80/458,514.45 = 81,020.10/x
  3. Step 3: Cross multiply
    305,662.80x = 458,514.45 × 81,020.10
  4. Step 4: Simplify right side
    305,662.80x = 37,148,886,590.45
  5. Step 5: Solve for x
    x = 37,148,886,590.45/305,662.80
  6. Step 6: Final answer
    x = 121,535.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.