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Finding the Fourth Proportional to 57,390.34, 79,198.60 and 31,895.91

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Solution

The fourth proportional to 57,390.34, 79,198.60 and 31,895.91 is: 44,016.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,390.34 : 79,198.60 = 31,895.91 : x
  2. Step 2: Convert to fraction form
    57,390.34/79,198.60 = 31,895.91/x
  3. Step 3: Cross multiply
    57,390.34x = 79,198.60 × 31,895.91
  4. Step 4: Simplify right side
    57,390.34x = 2,526,111,417.73
  5. Step 5: Solve for x
    x = 2,526,111,417.73/57,390.34
  6. Step 6: Final answer
    x = 44,016.32

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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.