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Finding the Fourth Proportional to 139,691.85, 209,570.31 and 39,853.41

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Solution

The fourth proportional to 139,691.85, 209,570.31 and 39,853.41 is: 59,789.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.85 : 209,570.31 = 39,853.41 : x
  2. Step 2: Convert to fraction form
    139,691.85/209,570.31 = 39,853.41/x
  3. Step 3: Cross multiply
    139,691.85x = 209,570.31 × 39,853.41
  4. Step 4: Simplify right side
    139,691.85x = 8,352,091,488.26
  5. Step 5: Solve for x
    x = 8,352,091,488.26/139,691.85
  6. Step 6: Final answer
    x = 59,789.40

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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.