Home / 68,740.23-103,110.39-18,820.74

Finding the Fourth Proportional to 68,740.23, 103,110.39 and 18,820.74

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Solution

The fourth proportional to 68,740.23, 103,110.39 and 18,820.74 is: 28,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,740.23 : 103,110.39 = 18,820.74 : x
  2. Step 2: Convert to fraction form
    68,740.23/103,110.39 = 18,820.74/x
  3. Step 3: Cross multiply
    68,740.23x = 103,110.39 × 18,820.74
  4. Step 4: Simplify right side
    68,740.23x = 1,940,613,841.49
  5. Step 5: Solve for x
    x = 1,940,613,841.49/68,740.23
  6. Step 6: Final answer
    x = 28,231.12

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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.