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Finding the Fourth Proportional to 85,453.41, 128,260.53 and 43,363.71

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Solution

The fourth proportional to 85,453.41, 128,260.53 and 43,363.71 is: 65,086.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,453.41 : 128,260.53 = 43,363.71 : x
  2. Step 2: Convert to fraction form
    85,453.41/128,260.53 = 43,363.71/x
  3. Step 3: Cross multiply
    85,453.41x = 128,260.53 × 43,363.71
  4. Step 4: Simplify right side
    85,453.41x = 5,561,852,427.37
  5. Step 5: Solve for x
    x = 5,561,852,427.37/85,453.41
  6. Step 6: Final answer
    x = 65,086.37

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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.