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Finding the Fourth Proportional to 42,662.78, 63,966.74 and 17,720.02

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Solution

The fourth proportional to 42,662.78, 63,966.74 and 17,720.02 is: 26,568.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,662.78 : 63,966.74 = 17,720.02 : x
  2. Step 2: Convert to fraction form
    42,662.78/63,966.74 = 17,720.02/x
  3. Step 3: Cross multiply
    42,662.78x = 63,966.74 × 17,720.02
  4. Step 4: Simplify right side
    42,662.78x = 1,133,491,912.13
  5. Step 5: Solve for x
    x = 1,133,491,912.13/42,662.78
  6. Step 6: Final answer
    x = 26,568.64

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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.