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Finding the Fourth Proportional to 85,945.68, 128,861.34 and 43,841.04

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Solution

The fourth proportional to 85,945.68, 128,861.34 and 43,841.04 is: 65,732.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,945.68 : 128,861.34 = 43,841.04 : x
  2. Step 2: Convert to fraction form
    85,945.68/128,861.34 = 43,841.04/x
  3. Step 3: Cross multiply
    85,945.68x = 128,861.34 × 43,841.04
  4. Step 4: Simplify right side
    85,945.68x = 5,649,415,161.39
  5. Step 5: Solve for x
    x = 5,649,415,161.39/85,945.68
  6. Step 6: Final answer
    x = 65,732.39

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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.