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Finding the Fourth Proportional to 85,052.80, 127,348.80 and 66,620.80

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Solution

The fourth proportional to 85,052.80, 127,348.80 and 66,620.80 is: 99,750.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,052.80 : 127,348.80 = 66,620.80 : x
  2. Step 2: Convert to fraction form
    85,052.80/127,348.80 = 66,620.80/x
  3. Step 3: Cross multiply
    85,052.80x = 127,348.80 × 66,620.80
  4. Step 4: Simplify right side
    85,052.80x = 8,484,078,935.04
  5. Step 5: Solve for x
    x = 8,484,078,935.04/85,052.80
  6. Step 6: Final answer
    x = 99,750.73

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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.