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Finding the Fourth Proportional to 86,216.43, 118,896.80 and 57,092.88

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Solution

The fourth proportional to 86,216.43, 118,896.80 and 57,092.88 is: 78,733.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,216.43 : 118,896.80 = 57,092.88 : x
  2. Step 2: Convert to fraction form
    86,216.43/118,896.80 = 57,092.88/x
  3. Step 3: Cross multiply
    86,216.43x = 118,896.80 × 57,092.88
  4. Step 4: Simplify right side
    86,216.43x = 6,788,160,895.18
  5. Step 5: Solve for x
    x = 6,788,160,895.18/86,216.43
  6. Step 6: Final answer
    x = 78,733.96

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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.