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Finding the Fourth Proportional to 81,693.78, 122,557.06 and 37,308.60

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Solution

The fourth proportional to 81,693.78, 122,557.06 and 37,308.60 is: 55,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.78 : 122,557.06 = 37,308.60 : x
  2. Step 2: Convert to fraction form
    81,693.78/122,557.06 = 37,308.60/x
  3. Step 3: Cross multiply
    81,693.78x = 122,557.06 × 37,308.60
  4. Step 4: Simplify right side
    81,693.78x = 4,572,432,328.72
  5. Step 5: Solve for x
    x = 4,572,432,328.72/81,693.78
  6. Step 6: Final answer
    x = 55,970.39

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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.