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Finding the Fourth Proportional to 68,720.76, 103,081.59 and 18,799.74

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Solution

The fourth proportional to 68,720.76, 103,081.59 and 18,799.74 is: 28,199.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,720.76 : 103,081.59 = 18,799.74 : x
  2. Step 2: Convert to fraction form
    68,720.76/103,081.59 = 18,799.74/x
  3. Step 3: Cross multiply
    68,720.76x = 103,081.59 × 18,799.74
  4. Step 4: Simplify right side
    68,720.76x = 1,937,907,090.79
  5. Step 5: Solve for x
    x = 1,937,907,090.79/68,720.76
  6. Step 6: Final answer
    x = 28,199.73

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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.