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Finding the Fourth Proportional to 74,685.96, 103,065.36 and 40,694.84

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Solution

The fourth proportional to 74,685.96, 103,065.36 and 40,694.84 is: 56,158.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,685.96 : 103,065.36 = 40,694.84 : x
  2. Step 2: Convert to fraction form
    74,685.96/103,065.36 = 40,694.84/x
  3. Step 3: Cross multiply
    74,685.96x = 103,065.36 × 40,694.84
  4. Step 4: Simplify right side
    74,685.96x = 4,194,228,334.74
  5. Step 5: Solve for x
    x = 4,194,228,334.74/74,685.96
  6. Step 6: Final answer
    x = 56,158.19

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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.