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Finding the Fourth Proportional to 81,394.66, 122,090.88 and 49,381.39

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Solution

The fourth proportional to 81,394.66, 122,090.88 and 49,381.39 is: 74,071.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,394.66 : 122,090.88 = 49,381.39 : x
  2. Step 2: Convert to fraction form
    81,394.66/122,090.88 = 49,381.39/x
  3. Step 3: Cross multiply
    81,394.66x = 122,090.88 × 49,381.39
  4. Step 4: Simplify right side
    81,394.66x = 6,029,017,360.72
  5. Step 5: Solve for x
    x = 6,029,017,360.72/81,394.66
  6. Step 6: Final answer
    x = 74,071.41

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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.