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Finding the Fourth Proportional to 66,921.45, 100,379.10 and 17,002.50

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Solution

The fourth proportional to 66,921.45, 100,379.10 and 17,002.50 is: 25,502.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,921.45 : 100,379.10 = 17,002.50 : x
  2. Step 2: Convert to fraction form
    66,921.45/100,379.10 = 17,002.50/x
  3. Step 3: Cross multiply
    66,921.45x = 100,379.10 × 17,002.50
  4. Step 4: Simplify right side
    66,921.45x = 1,706,695,647.75
  5. Step 5: Solve for x
    x = 1,706,695,647.75/66,921.45
  6. Step 6: Final answer
    x = 25,502.97

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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.