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Finding the Fourth Proportional to 81,173.68, 121,772.63 and 25,009.09

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Solution

The fourth proportional to 81,173.68, 121,772.63 and 25,009.09 is: 37,517.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,173.68 : 121,772.63 = 25,009.09 : x
  2. Step 2: Convert to fraction form
    81,173.68/121,772.63 = 25,009.09/x
  3. Step 3: Cross multiply
    81,173.68x = 121,772.63 × 25,009.09
  4. Step 4: Simplify right side
    81,173.68x = 3,045,422,421.30
  5. Step 5: Solve for x
    x = 3,045,422,421.30/81,173.68
  6. Step 6: Final answer
    x = 37,517.36

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1.5x scale

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.