Home / 85,403.35-128,183.39-43,312.71

Finding the Fourth Proportional to 85,403.35, 128,183.39 and 43,312.71

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Solution

The fourth proportional to 85,403.35, 128,183.39 and 43,312.71 is: 65,008.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.35 : 128,183.39 = 43,312.71 : x
  2. Step 2: Convert to fraction form
    85,403.35/128,183.39 = 43,312.71/x
  3. Step 3: Cross multiply
    85,403.35x = 128,183.39 × 43,312.71
  4. Step 4: Simplify right side
    85,403.35x = 5,551,969,997.89
  5. Step 5: Solve for x
    x = 5,551,969,997.89/85,403.35
  6. Step 6: Final answer
    x = 65,008.81

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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.