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Finding the Fourth Proportional to 66,205.40, 99,221.70 and 30,662.60

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Solution

The fourth proportional to 66,205.40, 99,221.70 and 30,662.60 is: 45,953.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,205.40 : 99,221.70 = 30,662.60 : x
  2. Step 2: Convert to fraction form
    66,205.40/99,221.70 = 30,662.60/x
  3. Step 3: Cross multiply
    66,205.40x = 99,221.70 × 30,662.60
  4. Step 4: Simplify right side
    66,205.40x = 3,042,395,298.42
  5. Step 5: Solve for x
    x = 3,042,395,298.42/66,205.40
  6. Step 6: Final answer
    x = 45,953.88

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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.