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Finding the Fourth Proportional to 74,785.43, 103,205.84 and 40,794.49

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Solution

The fourth proportional to 74,785.43, 103,205.84 and 40,794.49 is: 56,297.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,785.43 : 103,205.84 = 40,794.49 : x
  2. Step 2: Convert to fraction form
    74,785.43/103,205.84 = 40,794.49/x
  3. Step 3: Cross multiply
    74,785.43x = 103,205.84 × 40,794.49
  4. Step 4: Simplify right side
    74,785.43x = 4,210,229,607.82
  5. Step 5: Solve for x
    x = 4,210,229,607.82/74,785.43
  6. Step 6: Final answer
    x = 56,297.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.