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Finding the Fourth Proportional to 56,709.40, 85,067.34 and 21,651.88

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Solution

The fourth proportional to 56,709.40, 85,067.34 and 21,651.88 is: 32,479.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,709.40 : 85,067.34 = 21,651.88 : x
  2. Step 2: Convert to fraction form
    56,709.40/85,067.34 = 21,651.88/x
  3. Step 3: Cross multiply
    56,709.40x = 85,067.34 × 21,651.88
  4. Step 4: Simplify right side
    56,709.40x = 1,841,867,837.60
  5. Step 5: Solve for x
    x = 1,841,867,837.60/56,709.40
  6. Step 6: Final answer
    x = 32,479.06

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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.