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Finding the Fourth Proportional to 86,121.94, 118,858.11 and 47,885.29

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Solution

The fourth proportional to 86,121.94, 118,858.11 and 47,885.29 is: 66,087.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,121.94 : 118,858.11 = 47,885.29 : x
  2. Step 2: Convert to fraction form
    86,121.94/118,858.11 = 47,885.29/x
  3. Step 3: Cross multiply
    86,121.94x = 118,858.11 × 47,885.29
  4. Step 4: Simplify right side
    86,121.94x = 5,691,555,066.20
  5. Step 5: Solve for x
    x = 5,691,555,066.20/86,121.94
  6. Step 6: Final answer
    x = 66,087.17

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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.