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Finding the Fourth Proportional to 66,012.70, 98,982.60 and 21,616.60

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Solution

The fourth proportional to 66,012.70, 98,982.60 and 21,616.60 is: 32,412.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,012.70 : 98,982.60 = 21,616.60 : x
  2. Step 2: Convert to fraction form
    66,012.70/98,982.60 = 21,616.60/x
  3. Step 3: Cross multiply
    66,012.70x = 98,982.60 × 21,616.60
  4. Step 4: Simplify right side
    66,012.70x = 2,139,667,271.16
  5. Step 5: Solve for x
    x = 2,139,667,271.16/66,012.70
  6. Step 6: Final answer
    x = 32,412.96

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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.