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Finding the Fourth Proportional to 66,653.24, 99,979.90 and 17,405.24

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Solution

The fourth proportional to 66,653.24, 99,979.90 and 17,405.24 is: 26,107.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,653.24 : 99,979.90 = 17,405.24 : x
  2. Step 2: Convert to fraction form
    66,653.24/99,979.90 = 17,405.24/x
  3. Step 3: Cross multiply
    66,653.24x = 99,979.90 × 17,405.24
  4. Step 4: Simplify right side
    66,653.24x = 1,740,174,154.68
  5. Step 5: Solve for x
    x = 1,740,174,154.68/66,653.24
  6. Step 6: Final answer
    x = 26,107.87

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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.