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Finding the Fourth Proportional to 131,855.62, 181,915.99 and 74,486.56

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Solution

The fourth proportional to 131,855.62, 181,915.99 and 74,486.56 is: 102,766.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,855.62 : 181,915.99 = 74,486.56 : x
  2. Step 2: Convert to fraction form
    131,855.62/181,915.99 = 74,486.56/x
  3. Step 3: Cross multiply
    131,855.62x = 181,915.99 × 74,486.56
  4. Step 4: Simplify right side
    131,855.62x = 13,550,296,304.09
  5. Step 5: Solve for x
    x = 13,550,296,304.09/131,855.62
  6. Step 6: Final answer
    x = 102,766.16

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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.