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Finding the Fourth Proportional to 219,689.40, 329,514.90 and 71,945.40

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Solution

The fourth proportional to 219,689.40, 329,514.90 and 71,945.40 is: 107,911.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,689.40 : 329,514.90 = 71,945.40 : x
  2. Step 2: Convert to fraction form
    219,689.40/329,514.90 = 71,945.40/x
  3. Step 3: Cross multiply
    219,689.40x = 329,514.90 × 71,945.40
  4. Step 4: Simplify right side
    219,689.40x = 23,707,081,286.46
  5. Step 5: Solve for x
    x = 23,707,081,286.46/219,689.40
  6. Step 6: Final answer
    x = 107,911.81

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1.5x scale

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.