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Finding the Fourth Proportional to 66,479.56, 99,719.26 and 19,732.43

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Solution

The fourth proportional to 66,479.56, 99,719.26 and 19,732.43 is: 29,598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.56 : 99,719.26 = 19,732.43 : x
  2. Step 2: Convert to fraction form
    66,479.56/99,719.26 = 19,732.43/x
  3. Step 3: Cross multiply
    66,479.56x = 99,719.26 × 19,732.43
  4. Step 4: Simplify right side
    66,479.56x = 1,967,703,517.57
  5. Step 5: Solve for x
    x = 1,967,703,517.57/66,479.56
  6. Step 6: Final answer
    x = 29,598.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.