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Finding the Fourth Proportional to 84,279.60, 126,426.64 and 21,950

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Solution

The fourth proportional to 84,279.60, 126,426.64 and 21,950 is: 32,926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,279.60 : 126,426.64 = 21,950 : x
  2. Step 2: Convert to fraction form
    84,279.60/126,426.64 = 21,950/x
  3. Step 3: Cross multiply
    84,279.60x = 126,426.64 × 21,950
  4. Step 4: Simplify right side
    84,279.60x = 2,775,064,748
  5. Step 5: Solve for x
    x = 2,775,064,748/84,279.60
  6. Step 6: Final answer
    x = 32,926.89

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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.