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Finding the Fourth Proportional to 85,501.68, 128,321.64 and 43,960.56

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Solution

The fourth proportional to 85,501.68, 128,321.64 and 43,960.56 is: 65,976.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,501.68 : 128,321.64 = 43,960.56 : x
  2. Step 2: Convert to fraction form
    85,501.68/128,321.64 = 43,960.56/x
  3. Step 3: Cross multiply
    85,501.68x = 128,321.64 × 43,960.56
  4. Step 4: Simplify right side
    85,501.68x = 5,641,091,154.52
  5. Step 5: Solve for x
    x = 5,641,091,154.52/85,501.68
  6. Step 6: Final answer
    x = 65,976.38

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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.