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Finding the Fourth Proportional to 51,885.91, 71,606.04 and 28,919.31

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Solution

The fourth proportional to 51,885.91, 71,606.04 and 28,919.31 is: 39,910.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,885.91 : 71,606.04 = 28,919.31 : x
  2. Step 2: Convert to fraction form
    51,885.91/71,606.04 = 28,919.31/x
  3. Step 3: Cross multiply
    51,885.91x = 71,606.04 × 28,919.31
  4. Step 4: Simplify right side
    51,885.91x = 2,070,797,268.63
  5. Step 5: Solve for x
    x = 2,070,797,268.63/51,885.91
  6. Step 6: Final answer
    x = 39,910.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.