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Finding the Fourth Proportional to 66,998.62, 100,484.94 and 20,240.56

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Solution

The fourth proportional to 66,998.62, 100,484.94 and 20,240.56 is: 30,356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,998.62 : 100,484.94 = 20,240.56 : x
  2. Step 2: Convert to fraction form
    66,998.62/100,484.94 = 20,240.56/x
  3. Step 3: Cross multiply
    66,998.62x = 100,484.94 × 20,240.56
  4. Step 4: Simplify right side
    66,998.62x = 2,033,871,457.17
  5. Step 5: Solve for x
    x = 2,033,871,457.17/66,998.62
  6. Step 6: Final answer
    x = 30,356.92

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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.