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Finding the Fourth Proportional to 71,641.73, 98,866.49 and 39,379.87

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Solution

The fourth proportional to 71,641.73, 98,866.49 and 39,379.87 is: 54,344.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,641.73 : 98,866.49 = 39,379.87 : x
  2. Step 2: Convert to fraction form
    71,641.73/98,866.49 = 39,379.87/x
  3. Step 3: Cross multiply
    71,641.73x = 98,866.49 × 39,379.87
  4. Step 4: Simplify right side
    71,641.73x = 3,893,349,573.82
  5. Step 5: Solve for x
    x = 3,893,349,573.82/71,641.73
  6. Step 6: Final answer
    x = 54,344.72

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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.