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Finding the Fourth Proportional to 71,714.86, 98,958.93 and 39,878.62

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Solution

The fourth proportional to 71,714.86, 98,958.93 and 39,878.62 is: 55,028.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,714.86 : 98,958.93 = 39,878.62 : x
  2. Step 2: Convert to fraction form
    71,714.86/98,958.93 = 39,878.62/x
  3. Step 3: Cross multiply
    71,714.86x = 98,958.93 × 39,878.62
  4. Step 4: Simplify right side
    71,714.86x = 3,946,345,565.08
  5. Step 5: Solve for x
    x = 3,946,345,565.08/71,714.86
  6. Step 6: Final answer
    x = 55,028.28

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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.