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Finding the Fourth Proportional to 68,889.98, 103,335.52 and 18,972.84

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Solution

The fourth proportional to 68,889.98, 103,335.52 and 18,972.84 is: 28,459.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,889.98 : 103,335.52 = 18,972.84 : x
  2. Step 2: Convert to fraction form
    68,889.98/103,335.52 = 18,972.84/x
  3. Step 3: Cross multiply
    68,889.98x = 103,335.52 × 18,972.84
  4. Step 4: Simplify right side
    68,889.98x = 1,960,568,287.28
  5. Step 5: Solve for x
    x = 1,960,568,287.28/68,889.98
  6. Step 6: Final answer
    x = 28,459.41

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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.