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Finding the Fourth Proportional to 66,752.10, 100,143.95 and 21,773.21

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Solution

The fourth proportional to 66,752.10, 100,143.95 and 21,773.21 is: 32,664.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,752.10 : 100,143.95 = 21,773.21 : x
  2. Step 2: Convert to fraction form
    66,752.10/100,143.95 = 21,773.21/x
  3. Step 3: Cross multiply
    66,752.10x = 100,143.95 × 21,773.21
  4. Step 4: Simplify right side
    66,752.10x = 2,180,454,643.99
  5. Step 5: Solve for x
    x = 2,180,454,643.99/66,752.10
  6. Step 6: Final answer
    x = 32,664.96

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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.