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Finding the Fourth Proportional to 86,129.96, 118,844.93 and 47,888.43

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Solution

The fourth proportional to 86,129.96, 118,844.93 and 47,888.43 is: 66,078.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,129.96 : 118,844.93 = 47,888.43 : x
  2. Step 2: Convert to fraction form
    86,129.96/118,844.93 = 47,888.43/x
  3. Step 3: Cross multiply
    86,129.96x = 118,844.93 × 47,888.43
  4. Step 4: Simplify right side
    86,129.96x = 5,691,296,871.72
  5. Step 5: Solve for x
    x = 5,691,296,871.72/86,129.96
  6. Step 6: Final answer
    x = 66,078.02

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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.