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Finding the Fourth Proportional to 57,691.88, 86,551.77 and 21,668.65

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Solution

The fourth proportional to 57,691.88, 86,551.77 and 21,668.65 is: 32,508.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,691.88 : 86,551.77 = 21,668.65 : x
  2. Step 2: Convert to fraction form
    57,691.88/86,551.77 = 21,668.65/x
  3. Step 3: Cross multiply
    57,691.88x = 86,551.77 × 21,668.65
  4. Step 4: Simplify right side
    57,691.88x = 1,875,460,011.01
  5. Step 5: Solve for x
    x = 1,875,460,011.01/57,691.88
  6. Step 6: Final answer
    x = 32,508.21

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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.