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Finding the Fourth Proportional to 74,791.54, 103,212.62 and 40,800.75

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Solution

The fourth proportional to 74,791.54, 103,212.62 and 40,800.75 is: 56,305.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,791.54 : 103,212.62 = 40,800.75 : x
  2. Step 2: Convert to fraction form
    74,791.54/103,212.62 = 40,800.75/x
  3. Step 3: Cross multiply
    74,791.54x = 103,212.62 × 40,800.75
  4. Step 4: Simplify right side
    74,791.54x = 4,211,152,305.47
  5. Step 5: Solve for x
    x = 4,211,152,305.47/74,791.54
  6. Step 6: Final answer
    x = 56,305.20

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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.