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Finding the Fourth Proportional to 74,685.77, 103,065.06 and 40,694.54

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Solution

The fourth proportional to 74,685.77, 103,065.06 and 40,694.54 is: 56,157.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,685.77 : 103,065.06 = 40,694.54 : x
  2. Step 2: Convert to fraction form
    74,685.77/103,065.06 = 40,694.54/x
  3. Step 3: Cross multiply
    74,685.77x = 103,065.06 × 40,694.54
  4. Step 4: Simplify right side
    74,685.77x = 4,194,184,844.05
  5. Step 5: Solve for x
    x = 4,194,184,844.05/74,685.77
  6. Step 6: Final answer
    x = 56,157.75

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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.