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Finding the Fourth Proportional to 81,119.82, 121,677.90 and 36,714.42

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Solution

The fourth proportional to 81,119.82, 121,677.90 and 36,714.42 is: 55,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,119.82 : 121,677.90 = 36,714.42 : x
  2. Step 2: Convert to fraction form
    81,119.82/121,677.90 = 36,714.42/x
  3. Step 3: Cross multiply
    81,119.82x = 121,677.90 × 36,714.42
  4. Step 4: Simplify right side
    81,119.82x = 4,467,333,525.32
  5. Step 5: Solve for x
    x = 4,467,333,525.32/81,119.82
  6. Step 6: Final answer
    x = 55,070.80

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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.