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Finding the Fourth Proportional to 86,129.94, 118,869.17 and 47,893.30

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Solution

The fourth proportional to 86,129.94, 118,869.17 and 47,893.30 is: 66,098.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,129.94 : 118,869.17 = 47,893.30 : x
  2. Step 2: Convert to fraction form
    86,129.94/118,869.17 = 47,893.30/x
  3. Step 3: Cross multiply
    86,129.94x = 118,869.17 × 47,893.30
  4. Step 4: Simplify right side
    86,129.94x = 5,693,036,819.56
  5. Step 5: Solve for x
    x = 5,693,036,819.56/86,129.94
  6. Step 6: Final answer
    x = 66,098.23

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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.