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Finding the Fourth Proportional to 66,228.20, 99,359.90 and 28,772.20

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Solution

The fourth proportional to 66,228.20, 99,359.90 and 28,772.20 is: 43,165.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,228.20 : 99,359.90 = 28,772.20 : x
  2. Step 2: Convert to fraction form
    66,228.20/99,359.90 = 28,772.20/x
  3. Step 3: Cross multiply
    66,228.20x = 99,359.90 × 28,772.20
  4. Step 4: Simplify right side
    66,228.20x = 2,858,802,914.78
  5. Step 5: Solve for x
    x = 2,858,802,914.78/66,228.20
  6. Step 6: Final answer
    x = 43,165.95

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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.