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Finding the Fourth Proportional to 81,988.64, 122,982.99 and 63,295.97

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Solution

The fourth proportional to 81,988.64, 122,982.99 and 63,295.97 is: 94,943.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,988.64 : 122,982.99 = 63,295.97 : x
  2. Step 2: Convert to fraction form
    81,988.64/122,982.99 = 63,295.97/x
  3. Step 3: Cross multiply
    81,988.64x = 122,982.99 × 63,295.97
  4. Step 4: Simplify right side
    81,988.64x = 7,784,327,645.55
  5. Step 5: Solve for x
    x = 7,784,327,645.55/81,988.64
  6. Step 6: Final answer
    x = 94,943.98

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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.