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Finding the Fourth Proportional to 75,680.64, 104,449.68 and 45,872.64

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Solution

The fourth proportional to 75,680.64, 104,449.68 and 45,872.64 is: 63,310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,680.64 : 104,449.68 = 45,872.64 : x
  2. Step 2: Convert to fraction form
    75,680.64/104,449.68 = 45,872.64/x
  3. Step 3: Cross multiply
    75,680.64x = 104,449.68 × 45,872.64
  4. Step 4: Simplify right side
    75,680.64x = 4,791,382,568.76
  5. Step 5: Solve for x
    x = 4,791,382,568.76/75,680.64
  6. Step 6: Final answer
    x = 63,310.55

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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.