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Finding the Fourth Proportional to 81,699.78, 122,566.06 and 37,314.60

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Solution

The fourth proportional to 81,699.78, 122,566.06 and 37,314.60 is: 55,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,699.78 : 122,566.06 = 37,314.60 : x
  2. Step 2: Convert to fraction form
    81,699.78/122,566.06 = 37,314.60/x
  3. Step 3: Cross multiply
    81,699.78x = 122,566.06 × 37,314.60
  4. Step 4: Simplify right side
    81,699.78x = 4,573,503,502.48
  5. Step 5: Solve for x
    x = 4,573,503,502.48/81,699.78
  6. Step 6: Final answer
    x = 55,979.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.