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Finding the Fourth Proportional to 71,676.51, 98,906.48 and 39,842.31

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Solution

The fourth proportional to 71,676.51, 98,906.48 and 39,842.31 is: 54,978.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,676.51 : 98,906.48 = 39,842.31 : x
  2. Step 2: Convert to fraction form
    71,676.51/98,906.48 = 39,842.31/x
  3. Step 3: Cross multiply
    71,676.51x = 98,906.48 × 39,842.31
  4. Step 4: Simplify right side
    71,676.51x = 3,940,662,437.96
  5. Step 5: Solve for x
    x = 3,940,662,437.96/71,676.51
  6. Step 6: Final answer
    x = 54,978.44

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1.5x scale

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.