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Finding the Fourth Proportional to 68,740.75, 103,111.01 and 18,824.74

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Solution

The fourth proportional to 68,740.75, 103,111.01 and 18,824.74 is: 28,237.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,740.75 : 103,111.01 = 18,824.74 : x
  2. Step 2: Convert to fraction form
    68,740.75/103,111.01 = 18,824.74/x
  3. Step 3: Cross multiply
    68,740.75x = 103,111.01 × 18,824.74
  4. Step 4: Simplify right side
    68,740.75x = 1,941,037,673.08
  5. Step 5: Solve for x
    x = 1,941,037,673.08/68,740.75
  6. Step 6: Final answer
    x = 28,237.07

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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.