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Finding the Fourth Proportional to 68,716.68, 103,009.41 and 21,939.18

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Solution

The fourth proportional to 68,716.68, 103,009.41 and 21,939.18 is: 32,887.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,716.68 : 103,009.41 = 21,939.18 : x
  2. Step 2: Convert to fraction form
    68,716.68/103,009.41 = 21,939.18/x
  3. Step 3: Cross multiply
    68,716.68x = 103,009.41 × 21,939.18
  4. Step 4: Simplify right side
    68,716.68x = 2,259,941,987.68
  5. Step 5: Solve for x
    x = 2,259,941,987.68/68,716.68
  6. Step 6: Final answer
    x = 32,887.82

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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.