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Finding the Fourth Proportional to 86,054.11, 118,754.28 and 47,819.88

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Solution

The fourth proportional to 86,054.11, 118,754.28 and 47,819.88 is: 65,991.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,054.11 : 118,754.28 = 47,819.88 : x
  2. Step 2: Convert to fraction form
    86,054.11/118,754.28 = 47,819.88/x
  3. Step 3: Cross multiply
    86,054.11x = 118,754.28 × 47,819.88
  4. Step 4: Simplify right side
    86,054.11x = 5,678,815,419.09
  5. Step 5: Solve for x
    x = 5,678,815,419.09/86,054.11
  6. Step 6: Final answer
    x = 65,991.22

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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.