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Finding the Fourth Proportional to 81,991.64, 122,987.50 and 63,299.00

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Solution

The fourth proportional to 81,991.64, 122,987.50 and 63,299.00 is: 94,948.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,991.64 : 122,987.50 = 63,299.00 : x
  2. Step 2: Convert to fraction form
    81,991.64/122,987.50 = 63,299.00/x
  3. Step 3: Cross multiply
    81,991.64x = 122,987.50 × 63,299.00
  4. Step 4: Simplify right side
    81,991.64x = 7,784,985,911.72
  5. Step 5: Solve for x
    x = 7,784,985,911.72/81,991.64
  6. Step 6: Final answer
    x = 94,948.53

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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.