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Finding the Fourth Proportional to 68,720.41, 103,083.72 and 18,799.39

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Solution

The fourth proportional to 68,720.41, 103,083.72 and 18,799.39 is: 28,199.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,720.41 : 103,083.72 = 18,799.39 : x
  2. Step 2: Convert to fraction form
    68,720.41/103,083.72 = 18,799.39/x
  3. Step 3: Cross multiply
    68,720.41x = 103,083.72 × 18,799.39
  4. Step 4: Simplify right side
    68,720.41x = 1,937,911,054.93
  5. Step 5: Solve for x
    x = 1,937,911,054.93/68,720.41
  6. Step 6: Final answer
    x = 28,199.93

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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.