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Finding the Fourth Proportional to 71,668.76, 107,508.15 and 21,752.91

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Solution

The fourth proportional to 71,668.76, 107,508.15 and 21,752.91 is: 32,630.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,668.76 : 107,508.15 = 21,752.91 : x
  2. Step 2: Convert to fraction form
    71,668.76/107,508.15 = 21,752.91/x
  3. Step 3: Cross multiply
    71,668.76x = 107,508.15 × 21,752.91
  4. Step 4: Simplify right side
    71,668.76x = 2,338,615,111.22
  5. Step 5: Solve for x
    x = 2,338,615,111.22/71,668.76
  6. Step 6: Final answer
    x = 32,630.89

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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.