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Finding the Fourth Proportional to 85,570.80, 128,183.40 and 48,591.60

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Solution

The fourth proportional to 85,570.80, 128,183.40 and 48,591.60 is: 72,789.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,570.80 : 128,183.40 = 48,591.60 : x
  2. Step 2: Convert to fraction form
    85,570.80/128,183.40 = 48,591.60/x
  3. Step 3: Cross multiply
    85,570.80x = 128,183.40 × 48,591.60
  4. Step 4: Simplify right side
    85,570.80x = 6,228,636,499.44
  5. Step 5: Solve for x
    x = 6,228,636,499.44/85,570.80
  6. Step 6: Final answer
    x = 72,789.28

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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.