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Finding the Fourth Proportional to 85,403.56, 128,183.08 and 45,456.08

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Solution

The fourth proportional to 85,403.56, 128,183.08 and 45,456.08 is: 68,225.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.56 : 128,183.08 = 45,456.08 : x
  2. Step 2: Convert to fraction form
    85,403.56/128,183.08 = 45,456.08/x
  3. Step 3: Cross multiply
    85,403.56x = 128,183.08 × 45,456.08
  4. Step 4: Simplify right side
    85,403.56x = 5,826,700,305.60
  5. Step 5: Solve for x
    x = 5,826,700,305.60/85,403.56
  6. Step 6: Final answer
    x = 68,225.50

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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.