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Finding the Fourth Proportional to 85,226.60, 127,839.90 and 64,490.60

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Solution

The fourth proportional to 85,226.60, 127,839.90 and 64,490.60 is: 96,735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,226.60 : 127,839.90 = 64,490.60 : x
  2. Step 2: Convert to fraction form
    85,226.60/127,839.90 = 64,490.60/x
  3. Step 3: Cross multiply
    85,226.60x = 127,839.90 × 64,490.60
  4. Step 4: Simplify right side
    85,226.60x = 8,244,471,854.94
  5. Step 5: Solve for x
    x = 8,244,471,854.94/85,226.60
  6. Step 6: Final answer
    x = 96,735.90

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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.