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Finding the Fourth Proportional to 66,209.80, 99,288.30 and 21,824.20

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Solution

The fourth proportional to 66,209.80, 99,288.30 and 21,824.20 is: 32,727.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,209.80 : 99,288.30 = 21,824.20 : x
  2. Step 2: Convert to fraction form
    66,209.80/99,288.30 = 21,824.20/x
  3. Step 3: Cross multiply
    66,209.80x = 99,288.30 × 21,824.20
  4. Step 4: Simplify right side
    66,209.80x = 2,166,887,716.86
  5. Step 5: Solve for x
    x = 2,166,887,716.86/66,209.80
  6. Step 6: Final answer
    x = 32,727.60

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1.5x scale

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.